Revert "Revert "Switch external cvtres.exe for llvm's own resource library.""

This reverts commit 165e578e47f1cd38191120aad23a9020fb5476dd.

Forgot to run tests on this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307190 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed