Add some x86/x86-64 assembler tests.

Also add divq() and divl() to x86-64 assembler and clean up
a test. This is a follow-up to
    https://android-review.googlesource.com/1355865 .

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing -t 082-inline-execute
Bug: 156736938
Change-Id: Iade33a2250cea481249f6b976bc53c86663cb901
5 files changed