Unify the error messages for the various tools when `verifyModule()`
fails on an input module. The "brave new way" is:
lltool: path/to/input.ll: error: input module is broken!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233667 91177308-0d34-0410-b5e6-96231b3b80d8