Add some basic server tests to runner.go.

client_shim.cc and runner.go are generalized to handle both ends. Plumb a bit
through the test case to control which and add server versions of all the
cipher suite tests.

Change-Id: Iab2640b390f7ed7160c9a9bf6bb34b8bec761b2e
Reviewed-on: https://boringssl-review.googlesource.com/1091
Reviewed-by: Adam Langley <agl@google.com>
4 files changed