Patch to make host build work without gnutls.

diff -u -r ../mariadb-10.2.10/cmake/mariadb_connector_c.cmake ./cmake/mariadb_connector_c.cmake
--- ../mariadb-10.2.10/cmake/mariadb_connector_c.cmake	2017-10-30 09:10:43.000000000 +0100
+++ ./cmake/mariadb_connector_c.cmake	2017-11-22 00:20:32.172653814 +0100
@@ -15,7 +15,7 @@
   IF(WIN32)
     SET(CONC_WITH_SSL "SCHANNEL")
   ELSE()
-    SET(CONC_WITH_SSL "GNUTLS") # that's what debian wants, right?
+    SET(CONC_WITH_SSL "YASSL")
   ENDIF()
 ELSE()
   SET(CONC_WITH_SSL "OPENSSL")