BB: feeds: switch to openwrt-routing release branch

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

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@41889 3c298f89-4303-0410-b956-a3cf2f4a3e73

feeds.conf.default

 src-git packages https://github.com/openwrt/packages.git;for-14.07
 src-git luci http://git.openwrt.org/project/luci.git
-src-git routing https://github.com/openwrt-routing/packages.git
+src-git routing https://github.com/openwrt-routing/packages.git;for-14.07
 src-git telephony http://git.openwrt.org/feed/telephony.git
 src-git management https://github.com/openwrt-management/packages.git
 src-git oldpackages http://git.openwrt.org/packages.git