Revert "Devise a package-private means to determine the LLVM version string"

This didn't work out on the build servers. Investigating

This reverts commit r210313.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@210314 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed