openldap: update version to 2.4.39

Changed:
 * Move slapd from ${libexecdir} to ${sbin}:
   Installing slapd under ${sbin} is more FHS and LSB compliance
 * Manage init script by inheriting update-rc.d, than postinst
 * Add status for initscript
 * Rename the patch named with commit id to
   gnutls-Avoid-use-of-deprecated-function.patch
 * Add a patch for CVE-2013-4449
 * Add a patch to use /dev/urandom for entropy
 * Allow tls obtains random bits from /dev/urandom:
   The URANDOM_DEVICE is undefined for cross-compiling, define it as
   /dev/urandom to allow tls obtains random bits from /dev/urandom.
 * Add PACKAGECONFIG for mdb, ndb, relay and sock
 * Remove unsupported config for ldbm
 * Add license file

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