ObjectFile: introduce a COFF object file plugin #6854
Merged
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Windows uses COFF as an object file format and PE/COFF as an executable file format. They are subtly different and certain elements of a COFF file may not be present in an executable. Introduce a new plugin to add support for the COFF object file format which is required to support loading of modules built with -gmodules. This is motivated by Swift which serialises debugging information into a PCM which is a COFF object file.
Differential Revision: https://reviews.llvm.org/D149987
Reviewed By: bulbazord
(cherry picked from commit 5014830)