libgee, grilo, grilo-plugins: use GNOME alias to fix downloads in buildbot

Switch grilo, grilo-plugins and libgee to use the @GNOME alias for
source download in order to fix download problems in buildbot.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

libs/libgee/Makefile

@@ -17,7 +17,7 @@ PKG_LICENSE:=LGPL-2.1
 PKG_LICENSE_FILES:=COPYING
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
-PKG_SOURCE_URL:=https://download.gnome.org/sources/libgee/0.18/
+PKG_SOURCE_URL:=@GNOME/libgee/0.18/
 PKG_MD5SUM:=29ea6125e653d7e60b49a9a9544abc96
 
 PKG_FIXUP:=autoreconf

multimedia/grilo-plugins/Makefile

@@ -17,7 +17,7 @@ PKG_LICENSE:=LGPLv2.1
 PKG_LICENSE_FILES:=COPYING
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
-PKG_SOURCE_URL:=https://download.gnome.org/sources/grilo-plugins/0.2/
+PKG_SOURCE_URL:=@GNOME/grilo-plugins/0.2/
 PKG_MD5SUM:=62ecaad877b485a950259eef1ef38c18
 
 PKG_BUILD_DEPENDS:=glib2 grilo

multimedia/grilo/Makefile

@@ -17,7 +17,7 @@ PKG_LICENSE:=LGPLv2.1
 PKG_LICENSE_FILES:=COPYING
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
-PKG_SOURCE_URL:=https://download.gnome.org/sources/grilo/0.2/
+PKG_SOURCE_URL:=@GNOME/grilo/0.2/
 PKG_MD5SUM:=7eba405ada20fefcb877d534d9d4f
 
 PKG_BUILD_DEPENDS:=glib2 libsoup libxml2