Run gst-indent through the files

This is required before we enabled an indent test in the CI.

gstreamer/gstreamer-project#33
3 jobs for alatiera/gst-indent in 7 minutes and 25 seconds (queued for 5 minutes and 48 seconds)
Status Job ID Name Coverage
  Preparation
passed manifest #51840

00:00:26

 
  Build
passed build fedora x86_64 #51841

00:03:10

 
  Full Builds
passed build android arm64 api28 #51842

00:03:48