Add Hard Return to run_all_unit_tests.sh

(This is a merge of http://go/wvgerrit/14052)

Adds a hard return at the end of the output of run_all_unit_tests.sh
if tests failed, which was previously missing.

Change-Id: Ie888168fb965e1f116c2cd7d586b46736abc9c80

libwvdrmengine/run_all_unit_tests.sh

@@ -47,7 +47,7 @@ adb_shell_run am start com.widevine.test/com.widevine.test.MediaDrmAPITest
 if [ $final_result -eq 0 ]; then
   echo "MediaDrm unittests completed successfully!"
 else
-  printf '\n%s' "${failed_tests[@]}"
+  printf '\n%s\n' "${failed_tests[@]}"
   exit $final_result
 fi