Add a dependency on the AOT shim to all nacl_test_data PNaCl nexe targets.
The nexe isn't actually needed, so it could link against a
dummy PNaCl shim. However, something weird is going on and
it attempted to link against the real shim. See notes in
reverted NaCl roll:
Leaving out some of the PNaCl targets which actually do
manage to turn off pexe -> nexe translation.
Since this is selectively done, beware of flipping
'build_pnacl_newlib': 0 to 1.