package/webkitgtk: use proper USE_WOFF2 flag instead of ENABLE_WOFF2

Signed-off-by: Grzegorz Blach <grzegorz@blach.pl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit ef3deade617769e6e2f509985cddf0958cda4a02)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/webkitgtk/webkitgtk.mk

@@ -22,10 +22,10 @@ WEBKITGTK_CONF_OPTS = \
 	-DENABLE_INTROSPECTION=OFF \
 	-DENABLE_MINIBROWSER=ON \
 	-DENABLE_SPELLCHECK=ON \
-	-DENABLE_WOFF2=ON \
 	-DPORT=GTK \
 	-DUSE_LIBNOTIFY=OFF \
-	-DUSE_LIBHYPHEN=OFF
+	-DUSE_LIBHYPHEN=OFF \
+	-DUSE_WOFF2=ON
 
 # ARM needs NEON for JIT
 # i386 & x86_64 don't seem to have any special requirements