Backport of "examples/gl/gtk: Add missing dependency on gstgl" into 1.18
Backport of !855 (merged) "examples/gl/gtk: Add missing dependency on gstgl".
Commits:
- a6ed17c2 examples/gl/gtk: Add missing dependency on gstgl
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Backport of !855 (merged) "examples/gl/gtk: Add missing dependency on gstgl".
Commits: