build: add subproject fallback for wayland-protocols
Depends on [1].
[1]:
-wayland_protos = dependency('wayland-protocols', version: '>=1.21')
-wl_protocol_dir = wayland_protos.get_variable(pkgconfig: 'pkgdatadir')
+wayland_protos = dependency('wayland-protocols',
+ version: '>=1.21',
+ fallback: ['wayland-protocols', 'wayland_protocols'],
+ default_options: ['tests=false'],
+)
+wl_protocol_dir = wayland_protos.get_variable(pkgconfig: 'pkgdatadir', internal: 'pkgdatadir')
wayland_scanner_dep = dependency('wayland-scanner', native: true)
wayland_scanner = find_program(
