Update a few comments and reformat a decl for clarity.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186292 91177308-0d34-0410-b5e6-96231b3b80d8
Move BlockLiteralGeneric earlier in CGDebugInfo and remove
BlockLiteralGenericSet and replace with a call to isType() on the
BlockLiteralGeneric.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186293 91177308-0d34-0410-b5e6-96231b3b80d8
Reformat line.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186294 91177308-0d34-0410-b5e6-96231b3b80d8