[clang] [lld] [llvm] [LTO] Make stack usage files work with LTO (PR #178005)

[Teresa Johnson via cfe-commits]

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@@ -106,6 +106,11 @@ static cl::opt<std::string>
     LTOStatsFile("lto-stats-file",
                  cl::desc("Save statistics to the specified file"), cl::Hidden);
 
+cl::opt<std::string>
+    LTOStackUsageOutput("lto-stack-usage-output",
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teresajohnson wrote:

To clarify, you will need a force push once 1 and 2 are extracted and committed, to rebase on top of them. That is fine I was just referring to the prior force push. You could keep this PR for 3, to preserve the review history.

https://github.com/llvm/llvm-project/pull/178005