[compiler-rt] Fix reporting unrecognized flags in unit tests.
[compiler-rt] Fix reporting unrecognized flags in unit tests.

Previously, the warning messages might be issued within a wrong test case.

Differential Revision: https://reviews.llvm.org/D57318

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@352447 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