gdk-pixbuf: fix nativesdk do_configure failed

Since commit [92fc28498f gdk-pixbuf: rewrite the cross-build support
for tests] applied, it add meson option -Duse_prebuilt_tools=true to
taget.

Add the same option for nativesdk to fix do_configure failure
|../gdk-pixbuf-2.42.6/thumbnailer/meson.build:32:0: ERROR: Arrays do not
have a method called 'full_path'

(From OE-Core rev: 4781dad55cc0449a3dc52914e2b6f9eace91158e)

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-gnome/gdk-pixbuf/gdk-pixbuf_2.42.6.bb

@@ -48,6 +48,10 @@ EXTRA_OEMESON_class-target = " \
     -Duse_prebuilt_tools=true \
 "
 
+EXTRA_OEMESON_class-nativesdk = " \
+    -Duse_prebuilt_tools=true \
+"
+
 PACKAGES =+ "${PN}-xlib"
 
 # For GIO image type sniffing