* Add support to build risc-v 64 cpc & buildd images for LXD, cloud-images, and buildd targets.
[Test Case]
* Execute a riscv64 livefs build for the buildd subproject of ubuntu-base
* Execute a riscv64 livefs build for the ubuntu-cpc project
* Build should succeed since we have lxd builders, and the required packages to produce the above images.
[Regression Potential]
* Only debian/control is changed to install the extra utils that are now available on riscv64. Thus there should be no impact on any other arches or image types.
[Impact]
* Add support to build risc-v 64 cpc & buildd images for LXD, cloud-images, and buildd targets.
[Test Case]
* Execute a riscv64 livefs build for the buildd subproject of ubuntu-base
* Execute a riscv64 livefs build for the ubuntu-cpc project
* Build should succeed since we have lxd builders, and the required packages to produce the above images.
[Regression Potential]
* Only debian/control is changed to install the extra utils that are now available on riscv64. Thus there should be no impact on any other arches or image types.