no C99 named struct initializers on Windows

commit f5f9014c90 added the
first use of C99 named struct initializers which are not
supported on Windows.  Remove their use in external.c and
in ks_dir.c.

Change-Id: Ibb6b2d5b3dbd4041cb638d2c7a9bd6f916fd45d7

lib/gssapi/krb5/external.c

@@ -214,19 +214,19 @@ static gss_mo_desc krb5_mo[] = {
     },
     {
 	GSS_C_MA_AUTH_TARG,
-	.flags = GSS_MO_MA
+	GSS_MO_MA
     },
     {
 	GSS_C_MA_AUTH_INIT_ANON,
-	.flags = GSS_MO_MA
+	GSS_MO_MA
     },
     {
 	GSS_C_MA_DELEG_CRED,
-	.flags = GSS_MO_MA
+	GSS_MO_MA
     },
     {
 	GSS_C_MA_INTEG_PROT,
-	.flags = GSS_MO_MA
+	GSS_MO_MA
     },
     {
 	GSS_C_MA_CONF_PROT,