krb5: update to version 1.12.2

Changed:
 * Add init scripts and default configs based on debian
 * Add a patch for crosscompile nm
 * Add a patch to suppress /usr/lib in krb5-config
 * Add DESCRIPTION
 * Remove blacklist and inherit autotools-brokensep
 * Add PACKAGECONFIG for ldap and readline

Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>