libcanberra: skip dev-so QA for PN-gtk

* fixes:
libcanberra-0.26: non -dev/-dbg/-nativesdk package contains symlink .so: libcanberra-gtk path '/work/armv7a-vfp-neon-oe-linux-gnueabi/libcanberra/0.26-r2/packages-split/libcanberra-gtk/usr/lib/gtk-3.0/modules/libcanberra-gtk-module.so'

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>