Add gssapi/kerberos libs to mariadb connector lib check

After https://gerrit.libreoffice.org/c/core/+/159954 this started to
fail with:

    > instdir/program/libmysqlclo.so has suspicious NEEDED: libgssapi_krb5.so.2
    >

Change-Id: I6014136a053ba7ef92aef55a80517fb38c75e4ce
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168042
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>

bin/check-elf-dynamic-objects

@@ -192,6 +192,11 @@ local file="$1"
         */libpostgresql-sdbc-impllo.so)
             allowlist="${allowlist} ${kerberosallowlist}"
         ;;
+        */libmysqlclo.so)
+            if [ "$WITH_GSSAPI" = TRUE ]; then
+                allowlist="${allowlist} ${kerberosallowlist}"
+            fi
+        ;;
         */libconfigmgrlo.so)
             if [ "$ENABLE_DCONF" = TRUE ]; then
                 allowlist="${allowlist} ${dconfallowlist}"