dillo: fix jpeg dependency

dillo was explicitly pulling in libjpeg instead of the virtual 'jpeg'
package, even though it also works with jpeg-turbo.

Reported-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/dillo/dillo.mk

@@ -32,7 +32,7 @@ endif
 
 ifeq ($(BR2_PACKAGE_JPEG),y)
 DILLO_CONF_OPTS += --enable-jpeg
-DILLO_DEPENDENCIES += libjpeg
+DILLO_DEPENDENCIES += jpeg
 else
 DILLO_CONF_OPTS += --disable-jpeg
 endif