[MCJIT] Make sure eh-frame fixups use the target's pointer type, not the host's.

If the wrong pointer type is used it can cause corruption of the frame
description entries.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217124 91177308-0d34-0410-b5e6-96231b3b80d8