[MIR] Add support for the frame-destroy MachineInstr flag

We are printing / parsing the `frame-setup` MachineInstr flag but not
the `frame-destroy` one.

Differential Revision: https://reviews.llvm.org/D41509

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322071 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed