Add /etc/platform-build-info in images, SDK and deploy dir

This is step one as described in SPEC-720:

at build time, add information for static build information, like machine, agl features, layers commit ids (manifest) etc. The SDK should also expose the same information, so that they can be reused when packaging apps to add automatic platform dependencies (ex: an app would require AGL version >= 5.0.3 because SDK has version 5.0.3)