[clang] [OFFLOAD] Allow partial linkage when using spirv linker (PR #181263)

[Nick Sarnie via cfe-commits]

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@@ -149,6 +149,7 @@ void SPIRV::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   ArgStringList CmdArgs;
   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
 
+  CmdArgs.push_back("--allow-partial-linkage");
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sarnex wrote:

I don't think it's right to do this in general, can you try to restrict the change to only do this if we're openmp offloading? if you get stuck trying to detect that here let me know

https://github.com/llvm/llvm-project/pull/181263