Update Makefiles.

src/Makefile

@@ -77,7 +77,7 @@ $(EXEC).app: $(EXEC)
 	mkdir -p $@/Contents/Resources/ && \
 	cp Info.plist $@/Contents/ && \
 	cp resources/AppIcon.icns $@/Contents/Resources/ && \
-	cp $(EXEC) $@/Contents/MacOS/
+	cp $(EXEC) $@/Contents/MacOS/ && \
 	$(if $(DEBUG), codesign --entitlements $(EXEC).entitlements \
 		-s ${APPLE_DEVELOPMENT} -f --timestamp -o runtime $(EXEC).app, \
 		    codesign -s ${APPLE_DEVELOPER_ID_APPLICATION} -f --timestamp \