BUILD: Move duplicated files from providers to libsss_ldap_common.so
Files sss_ldap.c, user_info_msg.c were built in libsss_{ad,ipa,ldap}.so.
In these two files, there are functions sss_ldap_get_diagnostic_msg,
pack_user_info_chpass_error which are needed in libsss_ldap_common.so
sss_ldap_get_diagnostic_msg is used in src/providers/ldap/sdap_async.c,
src/providers/ldap/sdap_async_connection.c
pack_user_info_chpass_error is used in src/providers/ldap/ldap_auth.c
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
Reviewed-by: Simo Sorce <simo@redhat.com>