Generate CIPD files to download the current QEMU package.
Usage: fx qemu-cipd-ensure This looks at the current jiri checkout to find the QEMU package version to use. Then it generates CIPD files that you can copy over to any machine and use to get the QEMU package installed locally there. This works even if build host where you run this script and the place you use the output are different OS or machine types. The files `qemu-cipd.ensure` and `qemu-cipd.versions` will be generated in the current build directory. Comments in `qemu-cipd.ensure` explain how to use these files. It should work on any machine connected to the Internet with no prior setup.