waf: suppress help output on all-lower-case-and-dashes options

Author: peterbarker

wscript

@@ -2,6 +2,7 @@
 # encoding: utf-8
 # flake8: noqa
 
+import optparse
 import os.path
 import os
 import sys
@@ -118,13 +119,13 @@ def add_build_options(g):
             g.add_option(lower_enable_option,
                          action='store_true',
                          default=False,
-                         help=enable_description)
+                         help=optparse.SUPPRESS_HELP)
         lower_disable_option = disable_option.lower().replace("_", "-")
         if lower_disable_option != disable_option:
             g.add_option(lower_disable_option,
                          action='store_true',
                          default=False,
-                         help=disable_description)
+                         help=optparse.SUPPRESS_HELP)
 
 def add_script_options(g):
     '''add any drivers or applets from libraries/AP_Scripting'''