libglib2: use the 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

 - 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/libglib2/Config.in

@@ -3,7 +3,6 @@ config BR2_PACKAGE_LIBGLIB2
 	depends on BR2_USE_WCHAR # gettext
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_USE_MMU # fork()
-	select BR2_PACKAGE_GETTEXT if BR2_NEEDS_GETTEXT
 	select BR2_PACKAGE_LIBICONV if !BR2_ENABLE_LOCALE
 	select BR2_PACKAGE_LIBFFI
 	select BR2_PACKAGE_PCRE

package/libglib2/libglib2.mk

@@ -101,8 +101,8 @@ HOST_LIBGLIB2_CONF_OPTS = \
 	--with-pcre=system
 
 LIBGLIB2_DEPENDENCIES = \
-	host-pkgconf host-libglib2 host-gettext \
-	libffi pcre util-linux zlib $(if $(BR2_NEEDS_GETTEXT),gettext)
+	host-pkgconf host-libglib2 \
+	libffi pcre util-linux zlib $(TARGET_NLS_DEPENDENCIES)
 
 HOST_LIBGLIB2_DEPENDENCIES = \
 	host-gettext \