kexec-tools-klibc: import from meta-zaurus layer

* http://git.shr-project.org/git/?p=meta-smartphone.git;a=commit;h=437022644822e16804537e42ecfaa011f9e61bc6


* V2: reset PR (meta-zaurus users have to downgrade or reflash)
* V2: += used in EXTRA_OECONF, just in case for future changes

Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>