Revert "Driver: Don't mix system tools with devtoolset tools on RHEL"

This reverts commit r304293.

This was comitted accidentally.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_40@304296 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed