Move buildroot to bsp directory.

bsp/buildroot/package/luaposix/Config.in

@@ -0,0 +1,15 @@
+config BR2_PACKAGE_LUAPOSIX
+	bool "luaposix"
+	depends on BR2_PACKAGE_HAS_LUAINTERPRETER
+	select BR2_PACKAGE_NCURSES
+	select BR2_PACKAGE_LUABITOP if BR2_PACKAGE_LUA_5_1
+	# LuaBitOp is already included in LuaJIT
+	help
+	  luaposix is a POSIX binding, including curses, for Lua 5.1,
+	  5.2 and 5.3; like most libraries it simply binds to C APIs on
+	  the underlying system, so it won't work on non-POSIX
+	  systems. However, it does try to detect the level of POSIX
+	  conformance of the underlying system and bind only available
+	  APIs.
+
+	  https://github.com/luaposix/luaposix