Set a CXXRecordDecl to not be passed in registers if DW_CC_pass_by_reference...

Set a CXXRecordDecl to not be passed in registers if DW_CC_pass_by_reference when loading from DWARF

Summary:
This will fix a bug where during expression parsing we are not setting a CXXRecordDecl to not be passed in registers and the resulting code generation is wrong.
The DWARF attribute DW_CC_pass_by_reference tells us that we should not be passing in registers i.e. RAA_Indirect.
This change depends this clang change which fixes the fact that the ASTImporter does not copy RecordDeclBits for CXXRecordDecl: https://reviews.llvm.org/D61140

Differential Revision: https://reviews.llvm.org/D61146

llvm-svn: 359732