Qt Creator CMake port

Based on Tobias Hunger's work from a few months ago.

The CMake configuration needs libclang and Qt paths specified as
CMAKE_PREFIX_PATH.

Auto tests are run with "ctest". At the moment the pass rate is 87%.

Change-Id: Iba98e39bf22077d52706dce6c85986be67a6eab0
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/tracing/CMakeLists.txt

@@ -0,0 +1,35 @@
+if (WITH_TESTS)
+  set(TEST_SOURCES
+    runscenegraphtest.cpp runscenegraphtest.h
+  )
+endif()
+
+add_qtc_library(Tracing
+  DEPENDS Utils Qt5::Qml Qt5::Quick
+  PUBLIC_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}"
+  SOURCES ${TEST_SOURCES}
+    flamegraph.cpp flamegraph.h
+    flamegraphattached.h
+    safecastable.h
+    qml/tracing.qrc
+    timelineabstractrenderer.cpp timelineabstractrenderer.h timelineabstractrenderer_p.h
+    timelineformattime.cpp timelineformattime.h
+    timelineitemsrenderpass.cpp timelineitemsrenderpass.h
+    timelinemodel.cpp timelinemodel.h timelinemodel_p.h
+    timelinemodelaggregator.cpp timelinemodelaggregator.h
+    timelinenotesmodel.cpp timelinenotesmodel.h timelinenotesmodel_p.h
+    timelinenotesrenderpass.cpp timelinenotesrenderpass.h
+    timelineoverviewrenderer.cpp timelineoverviewrenderer.h timelineoverviewrenderer_p.h
+    timelinerenderer.cpp timelinerenderer.h timelinerenderer_p.h
+    timelinerenderpass.cpp timelinerenderpass.h
+    timelinerenderstate.cpp timelinerenderstate.h timelinerenderstate_p.h
+    timelineselectionrenderpass.cpp timelineselectionrenderpass.h
+    timelinetheme.cpp timelinetheme.h
+    timelinetracefile.cpp timelinetracefile.h
+    timelinetracemanager.cpp timelinetracemanager.h
+    timelinezoomcontrol.cpp timelinezoomcontrol.h
+    traceevent.h
+    traceeventtype.h
+    tracestashfile.h
+    tracing_global.h
+)