download.mk: fix packed checkout mirroring support

Changeset r48416  broke the downloading of mirrored, packed scm checkouts.

Fix this by removing the "@" sign in front of the download command which is
now executed as part of a larger shell command under flock.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 48733

include/download.mk

@@ -48,7 +48,7 @@ define DownloadMethod/default
 endef
 
 define wrap_mirror
-	$(if $(if $(MIRROR),$(filter-out x,$(MIRROR_MD5SUM))),@$(SCRIPT_DIR)/download.pl "$(DL_DIR)" "$(FILE)" "$(MIRROR_MD5SUM)" "" || ( $(1) ),$(1))
+$(if $(if $(MIRROR),$(filter-out x,$(MIRROR_MD5SUM))),$(SCRIPT_DIR)/download.pl "$(DL_DIR)" "$(FILE)" "$(MIRROR_MD5SUM)" "" || ( $(1) ),$(1))
 endef
 
 define DownloadMethod/cvs