Adrian Prantl a5206ce72a Module Debugging: Use the clang module signature as the module's dwo_id ...

when building a module. Clang already records the module signature when
building a skeleton CU to reference a clang module.

Matching the id in the skeleton with the one in the module allows a DWARF
consumer to verify that they found the correct version of the module
without them needing to know about the clang module format.

llvm-svn: 248345

2015-09-22 23:26:43 +00:00

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