Add cross references for the development process documents
that were converted to ReST:
	Documentation/SubmitChecklist
	Documentation/SubmittingDrivers
	Documentation/SubmittingPatches
	Documentation/development-process/development-process.rst
	Documentation/stable_kernel_rules.txt

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

This document is on good shape for ReST: all it was needed was
to fix the section markups, add a toctree, convert the tables
and add a few code/quote blocks.

While not strictly required, I opted to use lowercase for
the titles, just like the other books that were converted
to Sphinx.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>