meson: Add gtk guard

6 jobs for build_fix in 29 minutes and 30 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Preparation
passed gst indent #64103

00:00:18

passed manifest #64102

00:00:19

 
  Build
passed build fedora x86_64 #64104

00:02:42

 
  Test
passed check fedora #64105

00:15:47

 
  Full Builds
passed build android arm64 api28 #64106

00:03:02

passed build cerbero fedora x86_64 #64107

00:10:41