Remove bad read barrier from boot image relocation.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: Repeat with `kCheckDebugDisallowReadBarrierCount = true`.
Bug: 194017033
Change-Id: I9ced1eb194605d218a9f1941e15a378e4ec9877b
4 files changed