libjingle_unittest now compiles and passes on iOS! (reland of r5986)

Example run from cmd-line:
ninja -C out_ios/Debug-iphoneos libjingle_unittest && \
  ~/src/ios-deploy/ios-deploy -d -u -v -b \
    ~/src/wr/trunk/out_ios/Debug-iphoneos/libjingle_unittest.app

Note that the test's use of signals means that lldb will break in the middle
of the suite.  To ignore these signals tell lldb:

pro hand -p true -s false -n false SIGINT
pro hand -p true -s false -n false SIGTERM
continue

BUG=3241
R=kjellander@webrtc.org, tkchin@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/21369004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/talk@6025 4adac7df-926f-26a2-2b94-8c16560cd09d
11 files changed