Refactor run_qemu.sh to construct entire command into a variable

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

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