Don't completely drop methods we don't want to put
into a CXXRecordDecl on the ground; rather, put
them into the translation unit as functions.

<rdar://problem/13834404>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@181560 91177308-0d34-0410-b5e6-96231b3b80d8