Fix the multi arch issue of resolv_unit_test.

Test resolv_unit_test fails in MTS, according to the codewiz@,
this test does not need to be multilib. With compile_multi as first
can solve this issue so it's no need to add a duplicated test_config.

Bug: 146684390
Test: mts-tradefed run mts -m resolv_unit_test
Change-Id: I1ada0895f5d055a67d93a9159c54e6b60fd1402e