Port r206721 from google/4_8 to google/4_9 for ffmpeg afdo performance.
treee5f9f20b644844aa82bec9dbc6aff0b1db269234
drwxr-xr-x - gcc-4_6-mobile-vtable-security
drwxr-xr-x - gcc-4_6-mobile
drwxr-xr-x - gcc-4_6
drwxr-xr-x - gcc-4_6_2-mobile
drwxr-xr-x - gcc-4_6_3-mobile
drwxr-xr-x - gcc-4_7-integration
drwxr-xr-x - gcc-4_7-mobile-vtable-verification
drwxr-xr-x - gcc-4_7-mobile
drwxr-xr-x - gcc-4_7
drwxr-xr-x - gcc-4_8
drwxr-xr-x - gcc-4_9-mobile
drwxr-xr-x - gcc-4_9
drwxr-xr-x - integration
drwxr-xr-x - main