SCP: Added generic output routine sim_printf to output to stdout and sim_log (and sim_deb when enabled)

The goals here being to simplify calling code while getting consistent output delivered everywhere it may be useful.

Modified most places which explicitly used sim_log or merely called printf to now avoid doing that and merely call sim_printf().

PDP10/pdp10_sys.c

@@ -383,7 +383,7 @@ switch (fmt) {                                          /* case fmt */
         return load_exe (fileref);
         }
 
-printf ("Can't determine load file format\n");
+sim_printf ("Can't determine load file format\n");
 return SCPE_FMT;
 }