Fix test-art-target-oat for multi target

Avoids running dalvikvm with 32-bit native library. When the primary target is
64-bit, dalvikvm is a symlink to dalvikvm64 which can't load 32-bit native
library.

Bug: 15131102
Change-Id: I29c2f3b5a62b5f507674f3f6d1b9f3f2e5a9de23
2 files changed