Fix vm lib to work both in/out chroot.

lib/cros_vm_lib.sh

Index: lib/cros_vm_lib.sh
diff --git a/lib/cros_vm_lib.sh b/lib/cros_vm_lib.sh
index 1246baae39f14ea1bbeb930a509195f68cd26dd0..525729db0fba0671182ad192d06bf5e0cb9caf88 100644
--- a/lib/cros_vm_lib.sh
+++ b/lib/cros_vm_lib.sh
@@ -91,7 +91,14 @@ function start_kvm() {
 
 # Checks to see if we can access the target virtual machine with ssh.
 function ssh_ping() {
-  "${SCRIPT_ROOT}/ssh_test.sh" \
+  # TODO(sosa): Remove outside chroot use once all callers work inside chroot.
+  local cmd
+  if [ $INSIDE_CHROOT -ne 1 ]; then
+    cmd="${GCLIENT_ROOT}/src/scripts/ssh_test.sh"
+  else
+    cmd=/usr/lib/crosutils/ssh_test.sh
+  fi
+  "${cmd}" \
     --ssh_port=${FLAGS_ssh_port} \
     --remote=127.0.0.1 >&2
 }