downcase result output

That will make the output compatible with the expected result format for lava.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/include/functions.sh b/include/functions.sh
index b5d5401..2cc44b3 100644
--- a/include/functions.sh
+++ b/include/functions.sh
@@ -40,7 +40,7 @@
 
 log_skip() {
     log_begin "$@"
-    log_end "SKIP"
+    log_end "skip"
 }
 
 for_each_cpu() {
@@ -175,11 +175,11 @@
 
     $func $@
     if [ $? != 0 ]; then
-	log_end "FAIL"
+	log_end "fail"
 	return 1
     fi
 
-    log_end "PASS"
+    log_end "pass"
 
     return 0
 }