libmicrohttpd: Update to 0.9.34

This update fixes the following build error:

,----[ Build error ]
| ...
| .../libmicrospdy.so: undefined reference to `SSL_get_error'
| .../libmicrospdy.so: undefined reference to `SSL_write'
| .../libmicrospdy.so: undefined reference to `SSL_free'
| ...
`----

Reported-by: Prabhu Sundararaj <prabhu.sundararaj@freescale.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>