Do not use deprecated tasks in maven-antrun-plugin.

Maven-antrun-plugin deprecated tasks in favor of target, this patch
fixes JGit poms to do the same.

Change-Id: I420fd2ce88c61cf8e786ed45fbb8235dc30c124e
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Build with Tycho 0.22.

Change-Id: I32444e926179827be31d9201a6bbc5d514672110
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>