move all the target's asmprinters into the main target. The piece

move all the target's asmprinters into the main target.  The piece
that should be split out is the InstPrinter (if a target is mc'ized).
This change makes all the targets be consistent.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119056 91177308-0d34-0410-b5e6-96231b3b80d8