CMakeLists: Abort when llvm-size/llvm-profdata are not found

- Also add a new TEST_SUITE_COLLECT_CODE_SIZE option (default On) so
  user can opt out of the data collection with llvm-size.

git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@301355 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed