MB: Disable more parts of the GYP build.
MB: Disable more parts of the GYP build.

This will unblock planned work on libsrtp and reduce the exposed GYP surface.

BUG=webrtc:5949
NOTRY=True

Review-Url: https://codereview.webrtc.org/2314473002
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#14152}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 9c8c586dd3062749a9c73714dc4b0b9ccf297304

Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk