Run -fprofile-instr tests with %clang_cc1.

This should help avoid problems like the buildbot fallout from my change in
r203085. I left the CodeGenCXX tests alone for now.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@203131 91177308-0d34-0410-b5e6-96231b3b80d8