Add build rules for statically linked oatdump on host.

Also extend oatdump_test to exercise oatdump(d)s.

Test: ART_BUILD_HOST_STATIC=true m test-art-host-gtest-oatdump_test
Bug: 29530992
Change-Id: I6eb6c96f385832733d18d0400abd9974a6d8e45c