[Target] Rename X86/ARM Assembly printer to reflect reality.

This shows up a lot profiling LTO testcases with -time-passes, so
better have a non confusing name.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286488 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed