use mysqlnd, some tests fail otherwise

Author: smalyshev

travis/compile.sh

@@ -1,9 +1,9 @@
 #!/bin/bash
 ./buildconf
 ./configure --quiet \
---with-pdo-mysql \
---with-mysql \
---with-mysqli \
+--with-pdo-mysql=mysqlnd \
+--with-mysql=mysqlnd \
+--with-mysqli=mysqlnd \
 --with-pgsql \
 --with-pdo-pgsql \
 --with-pdo-sqlite \