codegen_test: Add missing dependency.

codegen_test: Add missing dependency.

The lack of this dependency causes two categories of errors :
- Running without the simulator on clean builds, since the dlopen
  in code_simulator_container.cc fails (and that isn't fatal).
- Spurious crashes whilst running against an old version of
  libartd-simulator, coupled with the fact that the new / free
  pair are in different shared libs.

Test: make -j32 test-art-host-gtest-codegen_test64
Change-Id: Ifd59688e62e248fcaf06ef14350eec989b853a61