tests/tcg: fix typo when calling clean-tcg

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

tests/Makefile.include

@@ -1081,7 +1081,7 @@ clean-tcg-tests-%:
 	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) \
 		-f $(SRC_PATH)/tests/tcg/Makefile.qemu \
 		SRC_PATH=$(SRC_PATH) TARGET="$*" clean-guest-tests, \
-		"RUN", "TCG tests for $*")
+		"CLEAN", "TCG tests for $*")
 
 .PHONY: build-tcg
 build-tcg: $(BUILD_TCG_TARGET_RULES)