[clang] [llvm] [LinkerWrapper] Always pass `-flto` if the linker supports it (PR #102972)

[Joseph Huber via cfe-commits]

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@@ -21,7 +21,6 @@
 // RUN: env LIBOMPTARGET_JIT_PRE_OPT_IR_MODULE=%t.pre.ll     \
 // RUN:     LIBOMPTARGET_JIT_SKIP_OPT=true                   \
 // RUN:     %libomptarget-run-generic
-// TODO:
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jhuber6 wrote:

Yeah, can remove it if needed.

https://github.com/llvm/llvm-project/pull/102972