The current examples belongs to 'examples/mcuboot' directory. This
moves related example code and Kconfig entries to their respective
project inside examples/mcuboot directory. It cleans all Kconfig
entries at 'boot/mcuboot', including Kconfig, Makefile and
README.md files.
This not perform any code modification.
Signed-off-by: Gerson Fernando Budke <gerson.budke@ossystems.com.br>