diffutils: only needs gettext if locale is selected

Also add missing select in Config.in.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/diffutils/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_DIFFUTILS
 	bool"diffutils"
 	depends on BR2_USE_WCHAR
+	select BR2_PACKAGE_GETTEXT if BR2_NEEDS_GETTEXT_IF_LOCALE
 	help
 	  GNU diff. Compare files per line.
 

package/diffutils/diffutils.mk

@@ -6,8 +6,7 @@
 
 DIFFUTILS_VERSION = 3.2
 DIFFUTILS_SITE = $(BR2_GNU_MIRROR)/diffutils
-DIFFUTILS_DEPENDENCIES = \
-	$(if $(BR2_PACKAGE_GETTEXT),gettext)
+DIFFUTILS_DEPENDENCIES = $(if $(BR2_NEEDS_GETTEXT_IF_LOCALE),gettext)
 
 ifeq ($(BR2_PACKAGE_BUSYBOX),y)
 DIFFUTILS_DEPENDENCIES += busybox