qt5base: 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/qt5/qt5base/qt5base.mk

@@ -211,7 +211,7 @@ endef
 
 define QT5BASE_INSTALL_TARGET_LIBS
 	for lib in $(QT5BASE_INSTALL_LIBS_y); do \
-		cp -dpf $(STAGING_DIR)/usr/lib/lib$${lib}.so.* $(TARGET_DIR)/usr/lib ; \
+		cp -dpf $(STAGING_DIR)/usr/lib/lib$${lib}.so.* $(TARGET_DIR)/usr/lib || exit 1 ; \
 	done
 endef