libtool: Set CONFIG_SHELL for nativesdk

We're seeing similar failures that we saw from libtool-native and libtool-cross
where /bin/sh changed from bash to dash on different machines after sstate
reusage. This patch fixes nativesdk to avoid the same issue.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
gcc: Include patch scheduled for GCC 4.8.3 to fix epilogue on ARM

GCC 4.8.0, 4.8.1 and 4.8.2 can generate broken epilogues for the
ABI used by the kernel. Apply the patch that is included for GCC
4.8.3 from http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854.

The issue was found on Yocto/Dora and the patch should be backported
to this branch. A kernel built with Dora's GCC 4.8.1 misbehaved on:

 while true;
 do
    (for i in `seq 1 100`;
        do
            echo "Log message... $RANDOM";
        done) | logger;
 done

busybox's syslogd would from time to read a huge negative value and
then exit, strace would get stuck waiting on a syscall. After this
patch it appears to work better.

Signed-off-by: Holger Hans Peter Freyther <holger@moiji-mobile.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>