FPC: got RX working, got client over usart somehow working..., see detailed commit msg

* using WITH_FPC:
  * activate basic usart
  * no double buffer for now, no interrupt
  * usart_dataavailable/usart_readbuffer/usart_writebuffer, to demo it:
    * pm3 client over USB, minicom over usart
    * analyse a d 414243
* using WITH_FPC_HOST:
  * it implies WITH_FPC as it's based on it
  * control pm3 with client over usart
  * EXPERIMENTAL! still some frame desync issues
  * you can connect both from usart & USB with two pm3 clients
    * actually you *have* to connect USB for the moment because
      it's used to send debug messages about buggy usart... See Dbprintf_usb below
  * "sessions": msgs are directed to the latest client to have sent a cmd
  * Dbprintf_usb macro to send msgs to USB client to help debugging usart...
  * We now have an option to run client at different speed as usart is 115200:
    client/proxmark3 /dev/ttyUSB0 -b 115200
  * Consequently, argc,argv handling is a bit revamped, it was so messy...
  * USB and flashing are still at 460800, don't try flashing over usart yet ^^

client/cmdhw.c

@@ -423,7 +423,7 @@ int CmdVersion(const char *Cmd) {
 #else
         PrintAndLogEx(NORMAL, "\n\e[34m [ Proxmark3 RFID instrument ]\e[0m\n");
 #endif
-        char s[50] = {0};
+        char s[60] = {0};
 #if defined(WITH_FLASH) || defined(WITH_SMARTCARD) || defined(WITH_FPC)
         strncat(s, "build for RDV40 with ", sizeof(s) - strlen(s) - 1);
 #endif
@@ -434,7 +434,11 @@ int CmdVersion(const char *Cmd) {
         strncat(s, "smartcard; ", sizeof(s) - strlen(s) - 1);
 #endif
 #ifdef WITH_FPC
+  #ifdef WITH_FPC_HOST
+        strncat(s, "fpc-host; ", sizeof(s) - strlen(s) - 1);
+  #else
         strncat(s, "fpc; ", sizeof(s) - strlen(s) - 1);
+  #endif
 #endif
         PrintAndLogEx(NORMAL, "\n [ CLIENT ]");
         PrintAndLogEx(NORMAL, "  client: iceman %s \n", s);