We need this fix since webrtc_call.gypi is included inside webrtc/webrtc.gyp. Fix for https://codereview.webrtc.org/2470913004/ BUG=webrtc:6412 NOTRY=True Review-Url: https://codereview.webrtc.org/2474883003 Cr-Commit-Position: refs/heads/master@{#14908}