Experiment with ulimit settings to see if it fixes test failure.

RELOCATE test is failing on a build bot with file size limit exceeded.
The suspicion is ANDROID_HOST_OUT is being set oddly on the build bot so
we don't find the right directory to use as the basis for setting the
ulimit on RELOCATE and end up with much too small a limit.

Test: test-art-host
Change-Id: I18bc6cf1888a4831a313aaaba6fab4f689825284