Disable audio_coding_unittests on Win x64 in code.
Disable audio_coding_unittests on Win x64 in code.

Having this failing test being disabled in code will make it
possible to add it on the bots again, and make thus no bot
configuration update needs to be communicated when it's fixed.

BUG=1458
TEST=Compiled with GYP_DEFINES=target_arch=x64 and ran the
test successsfully on Windows. Also ran regular trybots.

R=tina.legrand@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1593004

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 6eba2774c9182368f724189beb20070ee7053b8c

sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc