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 5 minutes and 46 seconds (queued for 46 minutes and 12 seconds)
Status Job ID Name Coverage
  Preparation
passed #52267
manifest

00:00:24

 
  Build
passed #52268
build fedora x86_64

00:01:53

 
  Full Builds
passed #52269
build android arm64 api28

00:03:28