webkit: fix misc build issues

Webkit depends on libjpeg, so add it as a dependency. Webkit also uses
icu but fails to find it if we don't pass ac_cv_path_icu_config to its
./configure script.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/webkit/webkit.mk

@@ -12,8 +12,9 @@ WEBKIT_INSTALL_TARGET = YES
 WEBKIT_LIBTOOL_PATCH = NO
 
 WEBKIT_DEPENDENCIES = host-flex host-gperf icu curl libxml2 libxslt	\
-			libgtk2 sqlite enchant libsoup
+			libgtk2 sqlite enchant libsoup jpeg
 
+WEBKIT_CONF_ENV = ac_cv_path_icu_config=$(STAGING_DIR)/usr/bin/icu-config
 
 ifeq ($(BR2_PACKAGE_XORG7),y)
 	WEBKIT_CONF_OPT += --with-target=x11