Added Callgrind format file export feature #46
Merged
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This adds a new file export feature to the File menu below the CSV exporter. The Callgrind Format can be visualized graphically in QCachegrind (QT version of KCachegrind which runs on Windows).
Due to the nature of sample profiling the exported call counts aren't available, so this exporter just writes the number of callstacks containing a call instead. But with the timings and caller/callee relationships it still is quite useful and fun to look at :-)
I tried to do like the code around me does but wanted to contain this new feature in one block thus the inline struct with the static helper functions. Feel free to request style changes.