pmqa: cpuidle: add test to check cpuidle statistics

Add functionality to record the current runtime cpuidle statistics
and show the same.

Signed-off-by: Sanjay Singh Rawat <sanjay.rawat@linaro.org>
diff --git a/Test.mk b/Test.mk
index 671bbf5..19d7346 100644
--- a/Test.mk
+++ b/Test.mk
@@ -36,7 +36,13 @@
 		echo 1; fi; else echo 1; fi)
 
 ifeq "$(SANITY_STATUS)" "1"
+
+ifeq "$(TEST)" "4"
+TST=cpuidle_04.sh
 run_tests: uncheck $(EXEC) $(LOG)
+else
+run_tests: uncheck $(EXEC) $(LOG)
+endif
 
 %.log: %.sh
 	@echo "###"