Sink DwarfDebug::constructSubprogramScopeDIE down into DwarfCompileUnit

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219436 91177308-0d34-0410-b5e6-96231b3b80d8
Sink DwarfDebug::createAndAddScopeChildren down into DwarfCompileUnit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219437 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused parameter

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219440 91177308-0d34-0410-b5e6-96231b3b80d8
Merge branch 'master', remote-tracking branch 'trunk/master'