[OpenCL] Make sure we put string literals in the constant address space.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194717 91177308-0d34-0410-b5e6-96231b3b80d8
ObjectiveC migrator: This patch sets access property
attributes on 'readonly' properties. // rdar://15460787


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194718 91177308-0d34-0410-b5e6-96231b3b80d8