About the cmdline --platform option

[KageKirin]

Hi,

I have a question about the command line --platform option:
In cmdline.lua, the options are defined as below, and if passed, the argument value is inside the active terms for matching against configuration specializations.

My questions:

• is it necessary to pass this flag? i.e. I've seen genie's makefile using this option, but I've been making my projects for 4+ without it
• the flag seems to be targeted at being matched against the platforms defined in the main genie file (i.e. the workspace settings).
• hence the actual main question: TegraAndroid is a valid enum value for platforms, but it's not allowed by the command line options.

	newoption
	{
		trigger     = "platform",
		value       = "VALUE",
		description = "Add target architecture (if supported by action)",
		allowed = {
			{ "x32",         "32-bit" },
			{ "x64",         "64-bit" },
			{ "universal",   "Mac OS X Universal, 32- and 64-bit" },
			{ "universal32", "Mac OS X Universal, 32-bit only" },
			{ "universal64", "Mac OS X Universal, 64-bit only" },
			{ "ps3",         "Playstation 3" },
			{ "orbis",       "Playstation 4" },
			{ "xbox360",     "Xbox 360" },
			{ "durango",     "Xbox One" },
			{ "ARM",         "ARM" },
			{ "PowerPC",     "PowerPC" },
		}
	}

Cheers.

[KageKirin]

This is related to #450.

I think it would be better to renamed TegraAndroid to Android and expose it to the --platform cli option.

What do you think?