Currently apps for Windows 8 and Windows Phone 8 are targeted to AnyCPU architecture, which is universal, but sometimes it's critical to build application for specific processor architecture.
As an example is WebSQL plugin which contains references to C++ libs so needs to be built for specific architecture (x84, x64, ARM) and which does not support AnyCPU target.
So it looks important to add support for additional build flags `-x64`, `-x86`, `-arm`, '-any' to specify target chip architecture.
If flag is not specified, `AnuCPU` target platform should be used by default.
|Add --archs option to build command for Windows||Closed||Unassigned|
|Add --archs option to build command for Windows Phone||Closed||Unassigned|