Makefile: Add support for custom VM images

Add a Make flags allowing the user to pass a custom VM image. If not
passed, the infrastructure defaults to using the host image, the
previous behavior. This will become necessary when booting VMs in
protected mode as pvmfw will expect an AVB-signed image (while the host
image is not).

Bug: 198568262
Test: make VM_IMAGE=<...> test-crosvm
Change-Id: I140d8632128a9bf0ea816d54790b5e3e25a6585a
1 file changed
tree: bb5d195a372e65781c07f3d847f4ece15aa34071
  1. aarch64/
  2. crosvm/
  3. cuttlefish/
  4. kvm-unit-tests/
  5. common.inc
  6. Makefile