perl: remove sysroot path leakage into packaged files

A grep in $D shows a lot of leakage which breaks things like CPAN:

[koen@rrmbp image]$ grep sysroot . -rn | grep -v Binary
./usr/lib/perl/5.14.3/cacheout.pl:50:if (open(PARAM,'/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/sys/param.h')) {
./usr/lib/perl/5.14.3/CORE/pp.h:53:#undef SP /* Solaris 2.7 i386 has this in /build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/sys/reg.h */
./usr/lib/perl/5.14.3/Config.pod:8076:used. Typically F</build/v2013.06/build/tmp>-angstrom_v2013_06-F<eglibc/sysroots/beaglebone/usr/include/string.h> or F</build/v2013.06/build/tmp>-angstrom_v2013_06-F<eglibc/sysroots/beaglebone/usr/include/strings.h>.
./usr/lib/perl/5.14.3/FileCache.pm:119:    foreach my $param ( '/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/sys/param.h' ){
./usr/lib/perl/5.14.3/Config.pm:87:    archlibexp => '/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/lib/perl/5.14.3/',
./usr/lib/perl/5.14.3/Config.pm:89:    cc => 'arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone',
./usr/lib/perl/5.14.3/Config.pm:101:    full_ar => '/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/x86_64-linux/usr/bin/armv7ahf-vfp-neon-angstrom-linux-gnueabi/arm-angstrom-linux-gnueabi-ar',
./usr/lib/perl/5.14.3/Config.pm:114:    ld => 'arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone',
./usr/lib/perl/5.14.3/Config_heavy.pl:169:archlibexp='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/lib/perl/5.14.3/'
./usr/lib/perl/5.14.3/Config_heavy.pl:186:cc="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone"
./usr/lib/perl/5.14.3/Config_heavy.pl:191:ccname="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone"
./usr/lib/perl/5.14.3/Config_heavy.pl:245:cpprun="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone -E"
./usr/lib/perl/5.14.3/Config_heavy.pl:246:cppstdin="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone -E"
./usr/lib/perl/5.14.3/Config_heavy.pl:745:full_ar='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/x86_64-linux/usr/bin/armv7ahf-vfp-neon-angstrom-linux-gnueabi/arm-angstrom-linux-gnueabi-ar'
./usr/lib/perl/5.14.3/Config_heavy.pl:927:ld="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone"
./usr/lib/perl/5.14.3/Config_heavy.pl:1167:strings='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/string.h'
./usr/lib/perl/5.14.3/Config_heavy.pl:1177:timeincl='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/sys/time.h /build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/time.h '
./usr/lib/perl/5.14.3/Config_heavy.pl:1229:usrinc='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include'
./usr/lib/perl/5.14.3/ExtUtils/Liblist/Kid.pm:58:    push(@libpath, "/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/lib");
./usr/lib/perl/config.sh:56:archlibexp='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/lib/perl/5.14.3/'
./usr/lib/perl/config.sh:73:cc="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone"
./usr/lib/perl/config.sh:78:ccname="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone"
./usr/lib/perl/config.sh:100:cpprun="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone -E"
./usr/lib/perl/config.sh:101:cppstdin="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone -E"
./usr/lib/perl/config.sh:591:full_ar='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/x86_64-linux/usr/bin/armv7ahf-vfp-neon-angstrom-linux-gnueabi/arm-angstrom-linux-gnueabi-ar'
./usr/lib/perl/config.sh:769:ld="arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone"
./usr/lib/perl/config.sh:986:strings='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/string.h'
./usr/lib/perl/config.sh:996:timeincl='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/sys/time.h /build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include/time.h '
./usr/lib/perl/config.sh:1042:usrinc='/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone/usr/include'

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>