kern-tools: make lower context patches reproducible

kern-tools: make lower context patches reproducible

It could be argued that it should be an error to have a
reduced context patch now that we've had many years to
ensure that our kernel path queues are clean.

But there are still some supported scenarios where a
patch is on multiple branches and reduced context makes
sense.

Applying the following patch to make sure these are
reproducible like the primary mode of application.

   kgit-s2q: use additional git-am options with reduced context as well

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>