Fix TryToShrinkGlobalToBoolean in GlobalOpt, so that it does not discard address spaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172051 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a copy/paste error in the IR Linker, casting an ArrayType instead of a VectorType.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172054 91177308-0d34-0410-b5e6-96231b3b80d8