gdk-pixbuf(-native): Fix build by disabling introspection

gdk-pixbuf(-native): Fix build by disabling introspection

Error message was:
| /home/Superandy/tmp/oe-core-eglibc/sysroots/x86_64-linux/usr/bin/g-ir-compiler  --includedir=. GdkPixbuf-2.0.gir -o GdkPixbuf-2.0.typelib
| /usr/share/gir-1.0/GLib-2.0.gir:9:1: error: Unsupported version '1.1'
| /usr/share/gir-1.0/GLib-2.0.gir:9:39: error: Unsupported version '1.1'
| error parsing file GdkPixbuf-2.0.gir: Failed to parse included gir GLib-2.0
| make[4]: *** [GdkPixbuf-2.0.typelib] Error 1

Signed-off-by: Andreas Mueller <schnitzeltony@gmx.de>