Implement macro TEST_PRINTF: Works like TEST_MESSAGE, but with a format-string.

Depends on UnityPrintFormatted (define UNITY_INCLUDE_PRINT_FORMATTED).
UnityPrintFormatted has been renamed to UnityPrintF due to changes below.

API of UnityPrintFormatted has been changed (hence the rename), but end users
(developers) can use the TEST_PRINTF as an almost-drop-in replacement TEST_PRINTF
is compatible with the old UnityPrintFormatted API (see below).

The behaviour of UnityPrintF has also been changed:
  - Now it prefixes the outout with test location information Output is marked
    as INFO.
  - It adds an EOL.

Both behaviours adopted from other output functions.

src/unity.h

@@ -104,6 +104,9 @@ void verifyTest(void);
 #define TEST_IGNORE()                                                                              UNITY_TEST_IGNORE(__LINE__, NULL)
 #define TEST_MESSAGE(message)                                                                      UnityMessage((message), __LINE__)
 #define TEST_ONLY()
+#ifdef UNITY_INCLUDE_PRINT_FORMATTED
+#define TEST_PRINTF(message, ...)                                                                  UnityPrintF(__LINE__, (message), __VA_ARGS__)
+#endif
 
 /* It is not necessary for you to call PASS. A PASS condition is assumed if nothing fails.
  * This method allows you to abort a test immediately with a PASS state, ignoring the remainder of the test. */