Disable optimization of Atomic::LoadJavaData for x86 targets.

Bug: http://b/34287931

The latest compiler exposes an issue on the fugu target where optimizing
LoadJavaData triggers a boot loop. This change suppresses that issue by
disabling optimization of this routine only on x86 targets.

Test: Fugu and ARM validation of new compiler.
Change-Id: Id369968cdf9fc95a306fb785c68e95b0ffa0027d
2 files changed