perl/Makefile: Fix a missing double-quote

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Acked-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

perl/Makefile

@@ -61,7 +61,7 @@ $(makfile): ../GIT-CFLAGS Makefile
 			subdir=/$${i%/*}; \
 		fi; \
 		echo '	$(RM) "$$(DESTDIR)$(instdir_SQ)/'$$i'.pm"' >> $@; \
-		echo '	mkdir -p "$$(DESTDIR)$(instdir_SQ)'$$subdir >> $@; \
+		echo '	mkdir -p "$$(DESTDIR)$(instdir_SQ)'$$subdir'"' >> $@; \
 		echo '	cp '$$i'.pm "$$(DESTDIR)$(instdir_SQ)/'$$i'.pm"' >> $@; \
 	done
 	echo '	$(RM) "$$(DESTDIR)$(instdir_SQ)/Error.pm"' >> $@