host-mariadb: compile against bundled yassl

On Fedora26, openssl 1.1.x is included by default.  This causes build
errors when building the host variant of mariadb.

Adding -DWITH_SSL=bundled fixes this issue.

Signed-off-by: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/mariadb/mariadb.mk

@@ -67,6 +67,8 @@ MARIADB_CONF_OPTS += \
 	-DMYSQL_DATADIR=/var/lib/mysql \
 	-DMYSQL_UNIX_ADDR=$(MYSQL_SOCKET)
 
+HOST_MARIADB_CONF_OPTS += -DWITH_SSL=bundled
+
 # Some helpers must be compiled for host in order to crosscompile mariadb for
 # the target. They are then included by import_executables.cmake which is
 # generated during the build of the host helpers. It is not necessary to build