Adding some FIXMEs to the attribute emitter code regarding whether pretty printing enumerators should use quoted string literals, or identifiers. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217781 91177308-0d34-0410-b5e6-96231b3b80d8
Objective-C SDK modernizer. Do not modernize an enum 
which already has the underlying interger type specification.
// rdar://1826225


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217783 91177308-0d34-0410-b5e6-96231b3b80d8
Pretty print attributes associated with record declarations.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217784 91177308-0d34-0410-b5e6-96231b3b80d8