avahi: use new gettext logic

This commit switches to use the new gettext logic, which involves:

 - using TARGET_NLS_DEPENDENCIES instead of hand-encoded dependencies
   on gettext/host-gettext

 - using TARGET_NLS_LIBS to force linking against libintl

 - dropping BR2_PACKAGE_GETTEXT selection

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/avahi/Config.in

@@ -4,7 +4,6 @@ config BR2_PACKAGE_AVAHI
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on !BR2_STATIC_LIBS
-	select BR2_PACKAGE_GETTEXT if BR2_NEEDS_GETTEXT_IF_LOCALE
 	help
 	  Avahi is a system which facilitates service
 	  discovery on a local network.

package/avahi/avahi.mk

@@ -97,8 +97,8 @@ AVAHI_CONF_OPTS = \
 	--with-autoipd-group=avahi
 
 AVAHI_DEPENDENCIES = \
-	$(if $(BR2_NEEDS_GETTEXT_IF_LOCALE),gettext) host-intltool \
-	host-pkgconf host-gettext
+	host-intltool host-pkgconf \
+	$(TARGET_NLS_DEPENDENCIES)
 
 AVAHI_CFLAGS = $(TARGET_CFLAGS)
 
@@ -168,7 +168,7 @@ endif
 
 AVAHI_CONF_ENV += CFLAGS="$(AVAHI_CFLAGS)"
 
-AVAHI_MAKE_OPTS += $(if $(BR2_NEEDS_GETTEXT_IF_LOCALE),LIBS=-lintl)
+AVAHI_MAKE_OPTS += LIBS=$(TARGET_NLS_LIBS)
 
 define AVAHI_USERS
 	avahi -1 avahi -1 * - - -