introduce convert-trace tool

The input (taken on stdin) is a gem5.opt --debug-flags=MemoryAccess
trace (--format gem5), or a dump-trace output (--format dump) for easy
trace synthesis (for testing purposes).

gem5 format: Currently imports physical, not virtual memory addresses.
dump format: Currently ignores extended trace information.

Change-Id: Ic26a996d6fb9ce4175c855fadcbcff9ac9263888

tools/convert-trace/CMakeLists.txt

@@ -0,0 +1,10 @@
+set(SRCS
+  main.cc
+  Gem5Converter.cc
+  DumpConverter.cc
+)
+
+add_executable(convert-trace ${SRCS})
+target_link_libraries(convert-trace fail-util fail-comm)
+
+install(TARGETS convert-trace RUNTIME DESTINATION bin)