Add compiler type to CompilerOptions.

Let CompilerOptions hold the information whether it is AOT
or JIT compilation, or Zygote JIT for shared code.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing --jit
Test: aosp_taimen-userdebug boots.
Change-Id: Id9200572406f8e43d99b8b61ef0e3edf43b52fff
14 files changed