Improve the code coverage reporting

src/IhtaAddTest.cmake

@@ -117,6 +117,10 @@ macro (ihta_add_test)
 			)
 		endif ()
 
+		# Set these variables here as well since, it doesn't seems to propagate correctly.
+		set (CPP_COVERAGE_ENABLE_COV_COMMANDS ON)
+		set (CPP_COVERAGE_ENABLE_PER_TARGET_COVERAGE_REPORTS ON)
+
 		cpp_coverage_add_test (
 			TARGET
 			${IHTA_ADD_TEST_NAME}