Fixes [YOCTO #11411]
To help clear up the importance of the naming convention a user
must follow when creating a nativesdk-myrecipe.bb recipe that
inherits the nativesdk class, I placed a warning note at the end
of the section for the "nativesdk.bbclass" section.
(From yocto-docs rev: e6dc512aaeb0267c2c15c17a599c6950728b4547)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>