Allow the user to override the compiler used for testing
Allow the user to override the compiler used for testing

Change-Id: I76d4708a26f17185efb746f4b836aa32f3f8a44f

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@205362 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