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Summary: A relocatable link through `clang -r` can go through the clang-linker-wrapper if offloading is enabled. This will have the effect of linking the device code and creating the wrapper module. It will then be merged into the final file. This is useful behavior on its own, but is likely not what is expected for a `-r` job. This patch makes the linker wrapper ignore the device code when doing a reloctable link. This has the effect of the linker merging the `.llvm.offloading` sections in the output object. These will then be parsed as normal when the executable is finally created. Even though this doesn't actually perform a reloctable link on the device code itself, it has a similar effect of combining multiple files into a single one.