[llvm-profgen][NFC] Fix test failure by making unwinder's output deterministic

[wlei]

Summary

Don't know why under Sanitizer build(asan/msan/ubsan), the std::unordered_map<string, ...>'s output order is reversed, make the regression test failed.

This change creates a workaround by using sorted container to make the output deterministic.

[hoy]

Thanks for the fast turnaround!

[wenlei]

Thanks for quick fix!

llvm/tools/llvm-profgen/PerfReader.cpp

202

Does this work?

std::map<std::string, RangeSample> OrderedCounter(Counter.begin(), Counter.end());

[wlei]

llvm/tools/llvm-profgen/PerfReader.cpp

202

Yeah, thanks for the suggestion!

[wlei]

change according wenlei's suggestion