about Libav that digging into the CPU run-time detection code that the
AVX support has an OS level check unlike the SSE code so it is safe.
- Revert back to not using the -Bsymbolic linker flag as was done for
quite some time to workaround an issue with pthreads but enabling it
exposed a bug with the mips64 linker and I'd rather do this consistently
across all archs as was done before instead of only for mips64 as has
been proposed.
- sync the libgsm hacking with my submitted diff from upstream.
ok ajacoutot@ sthen@
52770423f7