Merging r143896:
------------------------------------------------------------------------
r143896 | chandlerc | 2011-11-06 15:09:05 -0800 (Sun, 06 Nov 2011) | 3 lines
Remove the HasMultilib check. It was essentially useless. The driver now
looks for evidence of a multilib installation, and adds the appropriate
bits to the search paths.
------------------------------------------------------------------------
llvm-svn: 143953