[clang] [Clang][SYCL] Introduce clang-sycl-link-wrapper to link SYCL offloading device code (Part 1 of many) (PR #112245)

[Joseph Huber via cfe-commits]

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@@ -6728,7 +6728,10 @@ def fsycl : Flag<["-"], "fsycl">,
 def fno_sycl : Flag<["-"], "fno-sycl">,
   Visibility<[ClangOption, CLOption]>,
   Group<sycl_Group>, HelpText<"Disables SYCL kernels compilation for device">;
-
+def sycl_link : Flag<["--"], "sycl-link">, Flags<[HelpHidden]>,
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jhuber6 wrote:

Why is this necessary? Shouldn't it do this automatically if we pass in `.o` files or use `-Xlinker foo.c`?

https://github.com/llvm/llvm-project/pull/112245