open-watcom: fix Open Watcom build make file

Author: jmalak

Mkfiles/README

@@ -40,13 +40,15 @@ The Makefiles are:
 	See http://www.msys2.org/.
 
 
-  Filename      Target		Compiler	Tested with
+  Filename      Target			Compiler	Host OS
   ---------------------------------------------------------------------------
-  openwcom.mak	DOS,Win32,OS/2	OpenWatcom C	OpenWatcom 1.7 (Win32)
-		Linux (386)			OpenWatcom 1.9 (Linux)
+  openwcom.mak	Linux,DOS,Win32,OS/2	OpenWatcom 1.9 	Linux, Windows
+					OpenWatcom 2.0 	Linux, Windows
 
-	For building on a DOS, OS/2, Win32 or Linux host using OpenWatcom.
-	OpenWatcom can be downloaded from http://www.openwatcom.org/.
+	For compilation on a DOS, OS/2, Win32 or Linux host, Open Watcom 1.9 can be 
+	downloaded from http://www.openwatcom.org/ or from 
+	https://github.com/open-watcom/open-watcom-1.9/releases and Open Watcom 2.0 
+	from https://github.com/open-watcom/open-watcom-v2/releases.
 
 	Usage:	wmake /f Mkfiles/openwcom.mak <target>