[ARM] Add Thumb-2 code size optimization test for ASR (immediate).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216744 91177308-0d34-0410-b5e6-96231b3b80d8
[ARM] Add Thumb-2 code size optimization test for ASR (register).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216746 91177308-0d34-0410-b5e6-96231b3b80d8