Add some more libjingle targets to the GN build.

Add some more libjingle targets to the GN build.

Add usrsctp. Make Windows version configurable for this in the build.

direct_dependent_configs for libsrtp.

R=hclam@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/c63f22b374dd953b8003800babbe833688e4b93d

[brettw, 2014-09-02 21:24:22]

brettw@chromium.org changed reviewers:
+ hclam@chromium.org

[Alpha Left Google, 2014-09-02 21:53:11]

LGTM.

[brettw, 2014-09-02 22:07:32]

Committed patchset #2 (id:20001) manually as c63f22b (presubmit successful).

[commit-bot: I haz the power, 2014-09-10 03:21:03]

Patchset 2 (id:??) landed as
https://crrev.com/c63f22b374dd953b8003800babbe833688e4b93d
Cr-Commit-Position: refs/heads/master@{#293004}