Fixes [YOCTO #5089]
In the "Migration" section for going from 1.3 to 1.4, I have
added a new section to describe how the value of PE is now in
the generated Linux kernel image filename.
(From yocto-docs rev: 8ff3d263d2374ab3745e5264c3747e36674e7484)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>