Make our eliding of artificially-generated methods
in debug information more aggressive.  Emitting
classes containing these methods causes crashes in
Clang when dealing with complex code bases.

<rdar://problem/12640887>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@180895 91177308-0d34-0410-b5e6-96231b3b80d8