EdkRepo: Add source_manifest_repo argument to edkrepo_command.py

Add a common definition of the source_manifest_repo argument
to edkrepo_command.py to enable selection of the correct source
global manifest repository by commands.

Signed-off-by: Ashley E Desimone <ashley.e.desimone@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Puja Pandya <puja.pandya@intel.com>
Cc: Erik Bjorge <erik.c.bjorge@intel.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Prince Agyeman <prince.agyeman@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>

edkrepo/commands/arguments/edkrepo_cmd_args.py

@@ -16,3 +16,4 @@
 OVERRIDE_HELP = 'Ignore warnings'
 SUBMODULE_SKIP_HELP = 'Skip the pull or sync of any submodules.'
 COLOR_HELP = 'Force color output (useful with \'less -r\')'
+SOURCE_MANIFEST_REPO_HELP = "The name of the workspace's source global manifest repository"

edkrepo/commands/edkrepo_command.py

@@ -48,3 +48,9 @@ def run_command(self, args, config):
                          'positional' : False,
                          'required' : False,
                          'help-text' : arguments.SUBMODULE_SKIP_HELP}
+
+SourceManifestRepoArgument = {'name' : 'source-manifest-repo',
+                         'positional': False,
+                         'required' : False,
+                         'action' : 'store',
+                         'help-text' : arguments.SOURCE_MANIFEST_REPO_HELP}