libecore: fix build of host-libecore when X11 not available

The host-libecore build tries to build the X11 backend. This works if
you have X11 headers/libraries installed on your build machine, but
fails if you don't, and Buildroot shouldn't depend on such things
being installed.

Therefore, we force host-libecore to not build any of the graphical
backends (X, XCB or DirectFB).

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/efl/libecore/libecore.mk

@@ -12,7 +12,13 @@ LIBECORE_INSTALL_STAGING = YES
 LIBECORE_DEPENDENCIES = host-pkg-config libeina
 
 HOST_LIBECORE_DEPENDENCIES = host-pkg-config host-libeina host-libevas
-HOST_LIBECORE_CONF_OPT += --enable-ecore-evas
+HOST_LIBECORE_CONF_OPT += 		\
+	--enable-ecore-evas 		\
+	--disable-simple-x11 		\
+	--disable-ecore-directfb 	\
+	--disable-ecore-x 		\
+	--disable-ecore-x-xcb 		\
+	--disable-ecore-imf-xim
 
 # default options
 LIBECORE_CONF_OPT = --disable-simple-x11