cc/gcc: add 4.9.1

Signed-off-by: Cody P Schafer <dev@codyps.com>
update ppl to 0.12.1
ppl-0.11.2: add patch to work with gmp-5.1.0
ppl-0.12.1: add patch to work with gmp-5.1.0
samples: add  powerpc64 latest
glibc-eglibc: multilib-based target tweaking
force overwrite the config symlink so we avoid errors when updating ct-ng
XXX: install bashcomp to prefix
XXX: reinstall script