Bug fixes.

- G38.x was not printing correctly in the $G g-code state reports. Now
fixed.

- When investigating the above issue, it was noticed that G38.x
wouldn’t show at all, but instead a G0 would be printed. This was
unlike the v0.9j master build. It turned out volatile variables do not
like to be defined inside a C struct. These are undefined on how to be
handled. Once pulled out, all weird issues went away.

- Also changed two ‘sizeof()’ statements in the mc_probe() and
probe_state_monitor() functions to be more robust later on.

- Updated the commit logs to individual files for each minor release.
Forgot to update the generating script to account for this.

grbl/gcode.c

@@ -1044,7 +1044,7 @@ uint8_t gc_execute_line(char *line)
     protocol_buffer_synchronize(); // Sync and finish all remaining buffered motions before moving on.
     if (gc_state.modal.program_flow == PROGRAM_FLOW_PAUSED) {
       if (sys.state != STATE_CHECK_MODE) {
-        bit_true_atomic(sys.rt_exec_state, EXEC_FEED_HOLD); // Use feed hold for program pause.
+        bit_true_atomic(sys_rt_exec_state, EXEC_FEED_HOLD); // Use feed hold for program pause.
         protocol_execute_realtime(); // Execute suspend.
       }
     } else { // == PROGRAM_FLOW_COMPLETED