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i#5505 kernel trace: Add drpt2trace to decode PT traces

Merged qidongzhao requested to merge i5505-kernel-memtrace into master

Adds a PT raw traces decoding library and a command-line tool for testing it:

  • Adds drpt2ir. It is a static library that can decode PT raw traces. The next PR will support converting PT raw traces to DynamoRIO's IR(instr_t).
  • Adds drpt2trace. It is a command-line tool that invokes drpt2ir and is used to test drpt2ir's decoding APIs. The current version can decode the PT raw traces and count the number of instructions.
  • Updates clients/drcachesim/CMakeLists.txt to support building drpt2ir and drpt2trace.
  • Updates suite/tests/CMakeLists.txt to add a simple test for drpt2trace. The simple trace data is recorded by perf.

Issue: #5505