Fix libart tests on target

1. Add libart/d.so to the list of additional public libraries
2. Fix java.library.path to include /system/lib(64)? for tests
   run by dalvikvm

Bug: http://b/28449304
Change-Id: I11f2dc22e445389160d6f7ed6743bb9664cf3745
(cherry picked from commit 90d48f28af67ab44d755363bf92d57a1b3e72a29)
2 files changed