Stack Alignment: move functions from header file MachineFrameInfo.h.

No functional change for this commit. The follow-up patch will add more stuff to
these functions.

rdar://12713765


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169186 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed