test_acceptance_as3_sampling_Callback fails

[mrchnk]

test sampling/Callback.as fails when built with -AS3 flag
no problem while built with -ES flag

os: MacOS

[mrchnk]

Also found that test marked with expectedfail in tamarin failconfig.txt

Additional info about sampling fail
https://bugzilla.mozilla.org/show_bug.cgi?id=476864