DwarfDebug: Remove some more redundant explicit constructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195059 91177308-0d34-0410-b5e6-96231b3b80d8
DwarfDebug: Move trailing else to the same line as prior closing brace

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195060 91177308-0d34-0410-b5e6-96231b3b80d8
llvm-dwarfdump: support for emitting only the debug_types section using -debug-dump

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195063 91177308-0d34-0410-b5e6-96231b3b80d8