Add a few trace.py examples in tutorial.md #1543
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I added a few trace.py examples in tutorial.md which I encountered inside Facebook. I thought they are useful to give people a sense how trace.py may help them solve their particular issue without writing a full-fledged python/C++ BCC programs. In the future, more examples about trace.py, argdist.py, funccount.py can be added based on real use cases.
cc @brendangregg @goldshtn Please review and suggest a better place if you think tutorial.md is not appropriate.
Signed-off-by: Yonghong Song yhs@fb.com