Update the example used in explaining the PROVIDES variable to one
that actually exists, and point out that "+=" is unnecessary, a simple
assignment is sufficient.
(From yocto-docs rev: 80cd888ee81757bc5281f174b26974391ee45522)
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
5486dd3680