mariadb: Add pam_auth to server package.

When pam is enabled, the pam plugin in pulled into the
server package but not the auth tool which results in
following error on boot:

Starting to install database for mariadb
chown: cannot access '/usr/lib/plugin/auth_pam_tool_dir': No such file
or directory
Cannot change ownership of the '/usr/lib/plugin/auth_pam_tool_dir'
directory
 to the 'mysql' user. Check that you have the necessary permissions and
try again.

Signed-off-by: Jeremy A. Puhlman <jpuhlman@mvista.com>
Signed-off-by: Jeremy Puhlman <jpuhlman@mvista.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-dbs/mysql/mariadb.inc

@@ -299,6 +299,7 @@ FILES_${PN}-server = "\
     ${sbindir}/ndbd \
     ${sbindir}/ndb_mgmd \
     ${libdir}/plugin/*.so \
+    ${libdir}/plugin/auth_pam_tool_dir/auth_pam_tool \
     ${datadir}/mysql/ \
     ${localstatedir}/mysql/ \
     ${sysconfdir}/init.d/mysqld \