Add missing mul aliases for armv4 support. Add checks that armv4 can
assemble the various mul instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199026 91177308-0d34-0410-b5e6-96231b3b80d8
Typo


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199027 91177308-0d34-0410-b5e6-96231b3b80d8