fips setup version update.

[kkimdev]

It seems like fips setup's toolchain install is fixed and should be manually updated. How about letting fips manage the versions and allow an auto update command line something like: fips setup update

[floooh]

I tried something like this in the emsc-version branch for the emscripten SDK, you can basically add an optional SDK version string to ./fips setup emscripten and use this to install a specific version, or switch between installed SDK versions. I froze this because the emscripten SDK lacked a few features to find the path of a local SDK install.

Something similar might make sense for the Android SDK as well, I just haven't looked at it yet. The only tricky part in the emscripten implementation was to find the right emscripten SDK path in the cmake toolchain.