testing/mutter: disable ppc64le

Disabling for now:

../cogl/cogl-path/cogl-path.h:55:10: fatal error: cogl-path/cogl-path-enum-types.h: No such file or directory
 #include <cogl-path/cogl-path-enum-types.h>
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

testing/mutter/APKBUILD

@@ -5,7 +5,7 @@ pkgver=3.32.2
 pkgrel=0
 pkgdesc="clutter-based window manager and compositor"
 url="https://wiki.gnome.org/Projects/Mutter/"
-arch="all !s390x" # limited by gnome-settings-daemon
+arch="all !s390x !ppc64le" # limited by gnome-settings-daemon
 license="GPL-2.0-or-later"
 depends="xkeyboard-config zenity gsettings-desktop-schemas xorg-server-xwayland"
 makedepends="gnome-desktop-dev libcanberra-dev upower-dev json-glib-dev