veyron/runtimes/google/ipc/stream/crypto: Speed up handshakes.

Switch to TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, i.e., an ECDSA
certificate (instead of RSA) to reduce the time it takes for certificate
verifications in TLS. This speeds up VC establishment by about 4x, most
noticeable on Raspberry Pi's where setup takes 3 seconds right now and should
take 700ms with this commit.

See also:
https://veyron-review.googlesource.com/#/c/3358/

Change-Id: Ia86b122a7888cad3e8dde054689636acb78a628b
1 file changed
tree: 7dc71bd51fff54a3a739344beac7bb28e79cc89d
  1. examples/
  2. lib/
  3. runtimes/
  4. security/
  5. services/
  6. tools/