Fix vm lib to work both in/out chroot.

Change-Id: I41ca87d7970ce59c7bbbc0e8cdaeaf5bedb43776

BUG=chromium-os:13498
TEST=Ran it both in/out

Review URL: http://codereview.chromium.org/6750012

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
 }