Give credit where it's appropriate.

minichlink/microgdbstub.h

@@ -4,6 +4,8 @@
  *  You may freely license this file under the MIT-x11, or the 2- or 3- or New BSD Licenses.
  *  You may also use this as though it is public domain.
  *
+ * This project is based off of picorvd. https://github.com/aappleby/PicoRVD/
+ *
  * Simply:
  *   1: define the RV_ Functions
  *   2: Call the MicroGDB* functions needed.

minichlink/minichgdb.c

@@ -28,7 +28,7 @@ void SendReplyFull( const char * replyMessage );
 ///////////////////////////////////////////////////////////////////////////////
 // Actual Chip Operations
 
-// Several pieces from picorvd.
+// Several pieces from picorvd. https://github.com/aappleby/PicoRVD/
 int shadow_running_state = 1;
 int last_halt_reason = 5;
 uint32_t backup_regs[17];