fate: print list of tests with "make fate-list"

Originally committed as revision 24947 to svn://svn.ffmpeg.org/ffmpeg/trunk

Makefile

@@ -289,4 +289,7 @@ $(FATE): ffmpeg$(EXESUF) $(FATE_UTILS:%=tests/%$(HOSTEXESUF))
 	@echo "TEST    $(@:fate-%=%)"
 	$(Q)$(SRC_PATH)/tests/fate-run.sh $@ "$(SAMPLES)" "$(TARGET_EXEC)" "$(TARGET_PATH)" '$(CMD)' '$(CMP)' '$(REF)' '$(FUZZ)'
 
+fate-list:
+	@printf '%s\n' $(sort $(FATE))
+
 .PHONY: documentation *test regtest-* alltools check config