ebtables: 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/ebtables/ebtables.mk

@@ -28,7 +28,7 @@ define EBTABLES_INSTALL_TARGET_CMDS
 		$(@D)/$(EBTABLES_SUBDIR)/extensions/*.so; \
 		do \
 		$(INSTALL) -m 0755 -D $${so} \
-			$(TARGET_DIR)/lib/ebtables/`basename $${so}`; \
+			$(TARGET_DIR)/lib/ebtables/`basename $${so}` || exit 1; \
 	done
 	$(INSTALL) -m 0755 -D $(@D)/$(EBTABLES_SUBDIR)/ebtables \
 		$(TARGET_DIR)/sbin/ebtables