[build/clang_darwin] Fix the case reversal in r173465.
[build/clang_darwin] Fix the case reversal in r173465.

 - I got confused by the double negative, the test succends on 10.6, in which
   case we *do* want to perform the filter-out.

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@173977 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt