Make some minor fixes to grammar and layout, and add a short new section
describing how to setup and use the patchtest selftests properly.
(From OE-Core rev: 264185d2cfa31b1cf2534a8de21e4b17bb5bbf79)
Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>