[clang] [Driver][Darwin] Pass stack usage file for LTO (PR #178005)

[Marina Taylor 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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citymarina wrote:

Thanks for the pointers, I've landed parts 1 and 2 and updated this one for part 3.

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