Use correct define in H264 end-to-end tests.

Right now, the H264 end-to-end tests are not run on the bots.

BUG=None

Review-Url: https://codereview.webrtc.org/2484913007
Cr-Original-Commit-Position: refs/heads/master@{#15062}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 445fb8fa4fd27b7e49b0555fc47b29d0d98f2496
2 files changed