googlefontdirectory: add error handling to for loop

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/googlefontdirectory/googlefontdirectory.mk

@@ -16,7 +16,7 @@ define GOOGLEFONTDIRECTORY_INSTALL_TARGET_CMDS
 	for i in $(GOOGLEFONTDIRECTORY_FONTS); \
 	do \
 		$(INSTALL) -d $(TARGET_DIR)/usr/share/fonts/$$i && \
-		$(INSTALL) -m 0644 -t $(TARGET_DIR)/usr/share/fonts/$$i $(@D)/$$i/*.ttf; \
+		$(INSTALL) -m 0644 -t $(TARGET_DIR)/usr/share/fonts/$$i $(@D)/$$i/*.ttf || exit 1; \
 	done
 endef