Fix the bootstrap of CompilerRT with host compilers that don't support
emulating 128-bit arithmetic on 32-bit x86 targets. This should get the
bootstrap back for GCC 4.6 at least.

Suggestions on better ways to do the detection here are welcome...

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@165863 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed