Bump buidlroot version to 2018.02.6

bsp/buildroot/package/linux-tools/Config.in

@@ -8,18 +8,12 @@ config BR2_PACKAGE_LINUX_TOOLS
 config BR2_PACKAGE_LINUX_TOOLS_CPUPOWER
 	bool "cpupower"
 	depends on !BR2_bfin # pciutils
-	depends on BR2_USE_WCHAR || !BR2_NEEDS_GETTEXT # gettext
 	select BR2_PACKAGE_LINUX_TOOLS
 	select BR2_PACKAGE_PCIUTILS
-	select BR2_PACKAGE_GETTEXT if BR2_NEEDS_GETTEXT
 	help
 	  cpupower is a collection of tools to examine and tune power
 	  saving related features of your processor.
 
-comment "cpupower needs a toolchain w/ wchar"
-	depends on !BR2_bfin
-	depends on !BR2_USE_WCHAR && BR2_NEEDS_GETTEXT
-
 config BR2_PACKAGE_LINUX_TOOLS_GPIO
 	bool "gpio"
 	select BR2_PACKAGE_LINUX_TOOLS
@@ -54,9 +48,11 @@ config BR2_PACKAGE_LINUX_TOOLS_PERF
 	  code), single CPU or severals threads.
 
 	  This will build and install the userspace 'perf'
-	  command. It is up to the user to ensure that the kernel
-	  configuration has all the suitable options enabled to allow a
-	  proper operation of 'perf'.
+	  command.
+
+	  Your kernel must have CONFIG_PERF_EVENTS enabled to use perf
+	  profiling. Buildroot automatically enables this in the kernel
+	  configuration.
 
 	  https://perf.wiki.kernel.org/
 
@@ -83,4 +79,12 @@ comment "selftests needs BR2_PACKAGE_BUSYBOX_SHOW_OTHERS"
 	depends on BR2_USE_MMU
 	depends on !BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
 
+config BR2_PACKAGE_LINUX_TOOLS_TMON
+	bool "tmon"
+	select BR2_PACKAGE_LINUX_TOOLS
+	select BR2_PACKAGE_NCURSES
+	help
+	  tmon is a terminal-based tool (using curses) that allows the
+	  user to access thermal information about the system.
+
 endmenu