[llvm-mca] Fix how views are added to the InstructionTables.

This should fix the stack-use-after-scope reported by the asan buildbots after
revision 328493.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328499 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed