Raise up timeout value in UART, this is tricky (ugly?) hack to allow low speed UART device to run nfc-emulate.

libnfc/buses/uart.c

@@ -53,7 +53,7 @@ typedef struct {
 // Set time-out on 30 miliseconds
 const struct timeval timeout = { 
   .tv_sec  =     0, // 0 second
-  .tv_usec = 30000  // 30000 micro seconds
+  .tv_usec = 50000  // 50 ms
 };
 
 // Work-around to claim uart interface using the c_iflag (software input processing) from the termios struct