Updates the documentation for PROVIDES so that it recommends "+="
instead of "=".
(From yocto-docs rev: 39b2ca1e27592488d396d5f0d76965f0006515a1)
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>