Refactor to construct entire command into a variable

So as to be able to invoke QEMU twice during one invocation of the
script, refactor to construct the entire QEMU command into
the CMD variable before passing it to `exec`. No functional change

Test: make test
Change-Id: I79459ce84bfc90f58e04a042d3a40fa6c16bc04a
1 file changed
tree: 5e8a8eec2585ed479eb4ec97562d38ab3bc7b0ca
  1. Makefile
  2. aarch64/
  4. kvm-unit-tests/