Move instruction_set_ to CompilerOptions.

Removes CompilerDriver dependency from ImageWriter and
several other classes.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: Pixel 2 XL boots.
Test: m test-art-target-gtest
Test: testrunner.py --target --optimizing
Change-Id: I3c5b8ff73732128b9c4fad9405231a216ea72465
57 files changed