DWARF Type Hashing: Include reference and rvalue reference type in the declarable summary hashing path

More support for 7.25 Part 5.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193129 91177308-0d34-0410-b5e6-96231b3b80d8
Fix spelling, grammar, and match naming convention for test files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193130 91177308-0d34-0410-b5e6-96231b3b80d8
FIXME comment shouldn't have been doxygen style

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193131 91177308-0d34-0410-b5e6-96231b3b80d8
fix two typos.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193133 91177308-0d34-0410-b5e6-96231b3b80d8