Move setup-clienttools to devtest_setup.sh

This patch moves the call to setup-clienttools from
install-dependencies to devtest_setup.sh to support a
near future patch to allow for using packages in
setup-clienttools.  If they're building images from
packages, they'll likely want to use packages on the
host as well.

Change-Id: I13bc19fb7d4a9fd347eb09ef0accc50f28ce0475
Merge "Move setup-clienttools to devtest_setup.sh"