Add sanitize blacklist for libaom to avoid CFI violation

Function build_intra_predictors and dr_predictor have indirect call
to assembly code implemented by x86/x86_64 sse2, which triggers CFI
violation, and results in media.swcodec process be killed.
The fix is to add a sanitize blacklist file to skip these two functions
CFI check.
Bug: 139905222
Change-Id: Ic62d934bc2204de7ba496f05e4b7e6d79caaf9af
3 files changed