Bump buidlroot version to 2018.02.6

bsp/buildroot/package/fmt/Config.in

@@ -0,0 +1,11 @@
+config BR2_PACKAGE_FMT
+	bool "fmt"
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_WCHAR
+	help
+	  fmt is an open-source formatting library for C++. It can be
+	  used as a safe alternative to printf or as a fast alternative
+	  to IOStreams.
+
+comment "fmt needs a toolchain w/ C++, wchar"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR

bsp/buildroot/package/fmt/fmt.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256 35300a0d356529447a79ed5ccf419239d8b34f916e5d4625f046fd37afa3650a  fmt-4.0.0.tar.gz

bsp/buildroot/package/fmt/fmt.mk

@@ -0,0 +1,18 @@
+################################################################################
+#
+# fmt
+#
+################################################################################
+
+FMT_VERSION = 4.0.0
+FMT_SITE = $(call github,fmtlib,fmt,$(FMT_VERSION))
+FMT_LICENSE = BSD-2-Clause
+FMT_LICENSE_FILES = LICENSE.rst
+FMT_INSTALL_STAGING = YES
+
+FMT_CONF_OPTS = \
+	-DHAVE_OPEN=ON \
+	-DFMT_INSTALL=ON \
+	-DFMT_TEST=OFF
+
+$(eval $(cmake-package))