[HotColdSplit] Consider resume instructions to be cold

Resuming exception unwinding is roughly as unlikely as throwing an
exception.

Tested on LNT+externals (in particular, the C++ EH regression tests
provide end-to-end test coverage), as well as with a full build of iOS.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351491 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed