[ASan] Fix asan-(32|64)-bits lit tests feature.
[ASan] Fix asan-(32|64)-bits lit tests feature.

It broke down at some point, and all tests with
  REQUIRES: asan-(32|64)-bits
line stopped being executed. Restore the intended behavior.

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@231325 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