Bump buidlroot version to 2018.02.6

bsp/buildroot/package/libvips/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_LIBVIPS
 	bool "libvips"
-	depends on BR2_USE_WCHAR # gettext, libglib2
+	depends on BR2_USE_WCHAR # libglib2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
 	depends on BR2_USE_MMU # fork()
 	# C++ support is required to build libvips
@@ -8,7 +8,6 @@ config BR2_PACKAGE_LIBVIPS
 	depends on BR2_INSTALL_LIBSTDCPP
 	select BR2_PACKAGE_LIBGLIB2
 	select BR2_PACKAGE_LIBXML2
-	select BR2_PACKAGE_GETTEXT if BR2_NEEDS_GETTEXT_IF_LOCALE
 	help
 	  libvips is a 2D image processing library. Compared to
 	  similar libraries, libvips runs quickly and uses little

bsp/buildroot/package/libvips/libvips.mk

@@ -8,7 +8,7 @@ LIBVIPS_VERSION_MAJOR = 7.42
 LIBVIPS_VERSION = $(LIBVIPS_VERSION_MAJOR).2
 LIBVIPS_SOURCE = vips-$(LIBVIPS_VERSION).tar.gz
 LIBVIPS_SITE = http://www.vips.ecs.soton.ac.uk/supported/$(LIBVIPS_VERSION_MAJOR)
-LIBVIPS_LICENSE = LGPLv2.1+
+LIBVIPS_LICENSE = LGPL-2.1+
 LIBVIPS_LICENSE_FILES = COPYING
 # We're patching gtk-doc.make, so need to autoreconf
 LIBVIPS_AUTORECONF = YES
@@ -41,7 +41,7 @@ LIBVIPS_CONF_OPTS = \
 LIBVIPS_INSTALL_STAGING = YES
 LIBVIPS_DEPENDENCIES = \
 	host-pkgconf libglib2 \
-	libxml2 $(if $(BR2_NEEDS_GETTEXT_IF_LOCALE),gettext)
+	libxml2 $(TARGET_NLS_DEPENDENCIES)
 
 # --disable-cxx is broken upstream
 # https://github.com/jcupitt/libvips/issues/231