Import the meta-rust/README.md but relocate and rename it. (From OE-Core rev: a36b43187f9b78c279bdbd0ee9c6f7063a0e7cc7) Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>