package/webkitgtk: fix host dependencies

python 2.7 is required by the cmake stuff.
bison & flex are not used in the webkitgtk tree.

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Acked-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/webkitgtk/webkitgtk.mk

@@ -12,7 +12,7 @@ WEBKITGTK_LICENSE = LGPL-2.1+, BSD-2-Clause
 WEBKITGTK_LICENSE_FILES = \
 	Source/WebCore/LICENSE-APPLE \
 	Source/WebCore/LICENSE-LGPL-2.1
-WEBKITGTK_DEPENDENCIES = host-ruby host-flex host-bison host-gperf \
+WEBKITGTK_DEPENDENCIES = host-ruby host-python host-gperf \
 	enchant harfbuzz icu jpeg libgcrypt libgtk3 libsecret libsoup \
 	libtasn1 libxml2 libxslt sqlite webp woff2
 WEBKITGTK_CONF_OPTS = \