Bump buidlroot version to 2018.02.6

bsp/buildroot/package/lensfun/Config.in

@@ -0,0 +1,29 @@
+config BR2_PACKAGE_LENSFUN
+	bool "lensfun"
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_WCHAR # libglib2
+	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
+	depends on BR2_USE_MMU # libglib2
+	select BR2_PACKAGE_LIBGLIB2
+	help
+	  Lensfun itself is only a library for correcting several
+	  artefacts and a database for storing lens profiles. To
+	  actually use Lensfun to process your images you need an
+	  image editing application with Lensfun support.
+
+	  http://lensfun.sourceforge.net
+
+if BR2_PACKAGE_LENSFUN
+
+config BR2_PACKAGE_LENSFUN_TOOLS
+	bool "lensfun tools"
+	select BR2_PACKAGE_LIBPNG
+	help
+	  Build 'lenstool'.
+
+endif
+
+comment "lensfun needs a toolchain w/ C++, threads, wchar"
+	depends on BR2_USE_MMU
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS \
+		|| !BR2_USE_WCHAR