meson: set release date from .doap file for releases

Part-of: <gstreamer/gst-omx!69>
10 jobs for !69 with extract-release-date-from-doap-file-omx in 11 minutes and 9 seconds (queued for 7 seconds)
detached
Status Name Job ID Coverage
  Build Docker
passed alpine amd64 manifest builder docker #3511395

00:00:27

passed android docker #3511394

00:00:27

passed cerbero fedora amd64 docker #3511393

00:00:27

passed fedora amd64 docker #3511392

00:00:28

passed gst-indent amd64 docker #3511396

00:00:29

 
  Preparation
passed gst indent #3511398

00:00:57

passed manifest #3511397

00:01:00

 
  Build
passed build gst-omx tizonia fedora x86_64 #3511400

00:03:47

passed build gst-omx zynq fedora x86_64 #3511399

00:03:47

 
  Integrate
passed documentation #3511401

00:09:37