x11-wm/mutter: update to 47.10
- Switch to USES= gettext-tools and USE_XORG= xkbfile
- Remove default values in MESON_ARGS about OpenGL libraries
Note: this is the latest release of 47.x
Release notes: https://download.gnome.org/sources/mutter/47/mutter-47.10.news
PR: 289602