Remove Qt files from coverage

CMake/CTestCustom.cmake.in

@@ -14,6 +14,9 @@ SET(CTEST_CUSTOM_COVERAGE_EXCLUDE
   ".*/Testing/.*"
  
   ".*/CMakeExternals/.*"
+
+  "./ctkPixmapIconEngine.*"
+  "./ctkIconEngine.*"
   )
 
 # The following tests should not be run under valgrind