package/webkitgtk: disable gamepad support

Pass -DENABLE_GAMEPAD=OFF to CMake in order to disable support for the
gamepad API, which requires libmanette, a library that is not yet
available in Buildroot.

Signed-off-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 97b2511edb75ff885140f2ea3253d1a862c2cc58)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/webkitgtk/webkitgtk.mk

@@ -18,6 +18,7 @@ WEBKITGTK_DEPENDENCIES = host-ruby host-python host-gperf \
 	libtasn1 libxml2 libxslt openjpeg sqlite webp woff2
 WEBKITGTK_CONF_OPTS = \
 	-DENABLE_API_TESTS=OFF \
+	-DENABLE_GAMEPAD=OFF \
 	-DENABLE_GEOLOCATION=OFF \
 	-DENABLE_GTKDOC=OFF \
 	-DENABLE_INTROSPECTION=OFF \