security: add Serge Hallyn as a maintainer
security: add Serge Hallyn as a maintainer

Add Serge E. Hallyn <serge@hallyn.com> as a co-maintainer of the
security subsystem, to avoid having a single point of failure
in the development process.

Signed-off-by: James Morris <bb9ce606a3116cc7a99739bd8e2dd57a2d5b69c1@oracle.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs