classlib: add guards for x86_64 unwind implementation

On ARMv7 architecture we are compiling x86_64 unwind implementation
which depends on libgcc_s implemenation. In particular _Unwind_GetIP
call, which is exported by libgcc_s library for x86_84, but on ARMv7
_Unwind_GetIP is a macro. Macro depends on _Unwind_GetGR, which is
not a public symbol in libgcc_s. Here we might be using private and
not cross-platform solution for unwind. ``classlib'' is no more
maintaind project.

The patch adds guards for x86_64 specific implemention and it's not
compiled on ARMv7 architecture anymore.

Signed-off-by: David Abdurachmanov <davidlt@cern.ch>
ncurses: disable terminfo, enable termcap as a fallback

ncurses is not designed to build w/o terminfo database. Disable
database, but enable termcap as a fallback mechanism. A fallback
is required. By default terminfo database is full of hard links,
which are not supported by AFS. If we upload a package with hard
links we cannot install it on AFS.

Signed-off-by: David Abdurachmanov <davidlt@cern.ch>
pcre: use 8.33 verison on Fedora Core

We need libpcre.so.1 on Fedora Core, otherwise linker will report
possible conflicts with SELinux. Use 7.9 for all targets except
FC. For FC use 8.33.

Signed-off-by: David Abdurachmanov <davidlt@cern.ch>
Merge pull request #163 from davidlt/misc-fixes

[CMSSW_7_0_X][48][ARM] Misc. fixes