Update for command line man page

Amendment to CLI documentation re: Windows GUI/console executable differences and behaviours, as per arduino#3461, unless it is expected to change in the near future...

Author: pfeerick

build/shared/manpage.adoc

@@ -55,6 +55,13 @@ between multiple runs and only recompile the files that changed.
 Note that on MacOS X, the main executable is
 'Arduino.app/Contents/MacOS/Arduino' instead of 'arduino'.
 
+Note that on Windows, due to the diffence between GUI and console apps, that the 
+'arduino_debug.exe' is the appropriate executable to use if you want to use the majority
+of these command line options. The 'arduino.exe' GUI version of the launcher **may** perform
+some of the functions described below, but will not output any messages to the console, 
+meaning it is pretty useless if you want any feedback or to be able to keep log files for
+automated testing, etc.
+
 ACTIONS
 
 *--verify*::