contrib: Explicitly set remote branch for push
contrib: Explicitly set remote branch for push

Without setting explicitly the remote branch when pushing, I'm getting
the following error:

  fatal: The upstream branch of your current branch does not match
  the name of your current branch.  To push to the upstream branch
  on the remote, use

      git push origin HEAD:v1.7

  To push to the branch of the same name on the remote, use

      git push origin HEAD

  To choose either option permanently, see push.default in 'git help config'.

Signed-off-by: Paul Chaignon <a027184a55211cd23e3f3094f1fdc728df5e0500@cilium.io>

tgraf/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,cilium-team/cilium,tklauser/cilium,tklauser/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium,cilium/cilium,cilium/cilium,cilium-team/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,tgraf/cilium,tgraf/cilium,tklauser/cilium