Backport of "plugins-base gstgl: fix broken compilation of libsabi.c test on SLES15" into 1.20
Backport of !3638 (merged) "plugins-base gstgl: fix broken compilation of libsabi.c test on SLES15".
Commits:
- b713c141 plugins-base/tests/check/meson.build: add omitted Wayland dependence