init: Set read-only properties with the radio and PCB versions

Change-Id: I2f480fd7642a749dfd2452f60283b68a55a5b81f
bacon: Provide legacy /storage/sdcard0 symlink

Some apps still use this (eg. Astro File Manager).

Change-Id: Ie1d07bde0f5446cd5ef062377d987efd5bd6e031