Add missing third_party/quic_trace/src files

These files got omitted because there was a stray .gitmodules file in
the directory which put git into a weird limbo state where it had no
_normal_ record (.gitmodules, .git/config, .git/modules) of that
directory being a module, but it also ignored any files put there.

Change-Id: I1d46db197e8dc9f0f01f02fbc5a4cc5f02f04eda
10 files changed
tree: 2574a3a0c5a2d22b8d20e7db06976bec1a70cf33
  1. build/
  2. crypto/
  3. net/
  4. testing/
  5. third_party/
  6. tools/
  7. url/
  8. .gitignore
  9. DEPS