mcf: Change error message for unsupported MACHINEs (v4.0.11)

:Release Notes:
Improve error message.

:Detailed Notes:

:Testing Performed:
Only build tested.

:QA Notes:
No change to image.

:Issues Addressed:
[ES-468] Support checking mcf MACHINE arguments for validity

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>
Change-Id: Id9b9c8ea208130848c959c656261a2b4e9bc8c6f
Reviewed-on: https://g2g.palm.com/6155
Reviewed-by: DCO Verification
Build: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Susan Montooth <susan.montooth@lge.com>

Author: shr-project

mcf

@@ -25,7 +25,7 @@ from time import gmtime, strftime
 import shutil
 import glob
 
-__version__ = "4.0.10"
+__version__ = "4.0.11"
 
 logger = logging.getLogger(__name__)
 
@@ -900,7 +900,7 @@ if __name__ == '__main__':
     read_weboslayers(srcdir)
     for M in options.MACHINE:
         if M not in SUPPORTED_MACHINES:
-            logger.error("MACHINE argument '%s' isn't listed in supported machines in weboslayers.py '%s'" % (M, SUPPORTED_MACHINES))
+            logger.error("MACHINE argument '%s' isn't supported (does not appear in Machines in weboslayers.py '%s')" % (M, SUPPORTED_MACHINES))
             sys.exit(1)
 
     if options.mcfcommand != 'configure':