sysutils/gnome-control-center: unbreak build with Meson 0.61.0

panels/applications/meson.build:10:5: ERROR: Function does not take positional arguments.
panels/background/meson.build:10:5: ERROR: Function does not take positional arguments.
panels/camera/meson.build:10:5: ERROR: Function does not take positional arguments.
[...]

PR: 260943
Regressed by: https://github.com/mesonbuild/meson/commit/61f2866a9fa1