package: rename DISABLE_NLS to NLS_OPTS

We are going to use DISABLE_NLS not only for disabling NLS support,
but also to explicitly enable it. Therefore, this preparatory commit
renames it to NLS_OPTS, which is consistent with other foo_OPTS
variables defined in package/Makefile.in.

While at it, we replace the := assignments by regular = assignments.

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

package/Makefile.in

@@ -360,9 +360,9 @@ TARGET_CONFIGURE_ARGS = \
 ################################################################################
 
 ifeq ($(BR2_ENABLE_LOCALE),y)
-DISABLE_NLS :=
+NLS_OPTS =
 else
-DISABLE_NLS :=--disable-nls
+NLS_OPTS = --disable-nls
 endif
 
 ifneq ($(BR2_INSTALL_LIBSTDCPP),y)

package/pkg-autotools.mk

@@ -201,7 +201,7 @@ define $(2)_CONFIGURE_CMDS
 		--with-fop=no \
 		$$(if $$($$(PKG)_OVERRIDE_SRCDIR),,--disable-dependency-tracking) \
 		--enable-ipv6 \
-		$$(DISABLE_NLS) \
+		$$(NLS_OPTS) \
 		$$(SHARED_STATIC_LIBS_OPTS) \
 		$$(QUIET) $$($$(PKG)_CONF_OPTS) \
 	)