allow for target/<DEV>/files to be empty/non-existent

package/base-files/Makefile

@@ -26,7 +26,8 @@ INSTALL_STYLE:=		manual
 
 do-install:
 	$(CP) ./src/* $(IDIR_BASE_FILES)
-	$(CP) $(TOPDIR)/target/$(ADK_TARGET)/files/* $(IDIR_BASE_FILES)
+	# allow this to fail, as there might be no target-specific files to copy
+	-$(CP) $(TOPDIR)/target/$(ADK_TARGET)/files/* $(IDIR_BASE_FILES)
 ifeq (${ADK_TARGET_ROOTFS_NFSROOT},y)
 	@-rm $(IDIR_BASE_FILES)/etc/network/interfaces
 endif