libelementary: only use libethumb if libedbus is available.

libelementary uses the ethumb_client library, but that one is only built
if libedbus is available. So fixup the --enable/disable-ethumb according
to the selection of BR2_PACKAGE_LIBEDBUS.

Fixes e.g.
http://autobuild.buildroot.net/results/14ef98da6b0632e24514fef696fae9a650c90c96

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/efl/libelementary/libelementary.mk

@@ -18,7 +18,9 @@ LIBELEMENTARY_DEPENDENCIES = libeina libevas libecore libedje host-libedje \
 LIBELEMENTARY_CONF_OPT = --with-edje-cc=$(HOST_DIR)/usr/bin/edje_cc \
 			 --with-eet-eet=$(HOST_DIR)/usr/bin/eet
 
-ifeq ($(BR2_PACKAGE_LIBETHUMB),y)
+# libethumb_client is only built when ethumbd is built.
+# ethumbd is only built if edbus is built.
+ifeq ($(BR2_PACKAGE_LIBETHUMB)$(BR2_PACKAGE_LIBEDBUS),yy)
 LIBELEMENTARY_DEPENDENCIES += libethumb
 LIBELEMENTARY_CONF_OPT += --enable-ethumb
 else