Description:
------------
Trying to build ext/pdo_mysql or ext/mysqli (phpize && ./configure && make && make 
install) doesn't work (there are various references to ext/mysqlnd which should be 
../mysqlnd) but after fixing those broken references there's a file missing which 
is called from an include statement.

At ext/mysqlnd/mysqlnd_portability.h:40 the file 'php_mysqlnd_config.h' is 
referenced but nowhere to be found. This prevents ext/pdo_mysql or ext/mysqli from 
being built.

Expected result:
----------------
Compiling ext/pdo_mysql or ext/mysqli successfully.

Actual result:
--------------
make fails with (for example)

In file included from /opt/phpfarm/src/php-
5.4.0/ext/mysqli/../mysqlnd/mysqlnd.h:60,
                 from /opt/phpfarm/src/php-
5.4.0/ext/mysqli/php_mysqli_structs.h:42,
                 from /opt/phpfarm/src/php-5.4.0/ext/mysqli/mysqli.c:34:
/opt/phpfarm/src/php-5.4.0/ext/mysqli/../mysqlnd/mysqlnd_portability.h:40:36: 
error: ./php_mysqlnd_config.h: No such file or directory
make: *** [mysqli.lo] Error 1