"veyron2/security": Added BlessingRoots and BlessingStore

Added the BlessingRoots and BlessingStore interfaces from
https://veyron-review.googlesource.com/#/c/4102/ and
implemented them in veyron/runtimes/google/rt

At the moment the interfaces are not used anywhere, the next CL
will replace PublicIDStore and the current TrustedKeys map
with BlessingStore and BlessingRoots respectively.

Change-Id: I8f16d739098b51cb82ebbd25a17cee30547c80f5
5 files changed
tree: 5198ddae1b54faf0119e8d2c0d464b406f9936c7
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/