Added option to use dx in dexfuzz testing as well.

Rationale:
Moving away from jack, we need all our fuzzing tools
to be able to use alternative compilation paths.

BUG: 19637031

Test: nightly fuzzing (Aart's cron job for now)
Change-Id: I92b13e46ed692d7813c072b576d8a3267ff36dd5
3 files changed