adding Upstream-Status remarks to patches in recipes-ros

This commit further adds a simple fix to the patch for the ros-comm
repository.
Merge pull request #253 from bulwahn/add-patch-upstream-status

adding Upstream-Status to patches in recipes-ros
ros-comm: correcting patch after manual change (resolves #254)

In the commit 21f7799ee922bb055c505f644e9425a2ec15ee85, I manually
modified the patch, but it slipped my eyes to adjust the line
information in the patch accordingly.
This commit corrects the line information, so that the patch can
now be applied correctly.