Add cleanspec for renamed libdexfile_support test.

Bug: 124637487
Test: Buildbot style device test:
  art/tools/buildbot-build.sh -j8 --target && \
  art/tools/cleanup-buildbot-device.sh && \
  art/tools/setup-buildbot-device.sh && \
  art/tools/buildbot-sync.sh && \
  art/tools/run-gtests.sh
Change-Id: Ifb409f9e7455fd237acbce3e74c2e9e63c02ca0a