[sancov] Run sancov tests on more platforms

The only tests that need to be run on Linux are the ones that use C++
demangling. I'm assuming they will fail on Mac, since __cxa_demangle
there won't handle the non-double-underscore prefixed mangled names.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271695 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed