Fix the tools/art script about the ISA-specific dalvik cache.
Fix the tools/art script about the ISA-specific dalvik cache.

Bug: 14470552
Change-Id: I71367052d2a5f0dcf66cf2dfdbc260aff4ac952e

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst