xerces: disable build and installation of samples

This commit tweaks the Makefile.in to not build and install example
applications.

[Thomas: improve commit log, rebase on top of latest master.]

Signed-off-by: Damien Lanson <damien@kal-host.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/xerces/xerces.mk

@@ -15,6 +15,12 @@ XERCES_CONF_OPTS = \
 	--disable-threads \
 	--with-gnu-ld
 
+define XERCES_DISABLE_SAMPLES
+	$(SED) 's/ samples//' $(@D)/Makefile.in
+endef
+
+XERCES_POST_PATCH_HOOKS += XERCES_DISABLE_SAMPLES
+
 ifeq ($(BR2_PACKAGE_LIBICONV),y)
 XERCES_CONF_ENV += LIBS=-liconv
 XERCES_DEPENDENCIES += libiconv