[TableGen] Make the ambiguous match debug messages from the AsmMatcherEmitter slightly more useful.

Don't report ambiguous matches on different variants. Print the variant number in the output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321938 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed