[gnome-keyring] (10 commits) ...Basic test for ssh-agent communication and key types

[Daiki Ueno <dueno src gnome org>]

Summary of changes:

  32680d2... ASN.1 definitions of ECDSA and helper functions for DER enc (*)
  cf34a4e... ECDSA support in GKM internals (*)
  c000b98... Reading and writing ECDSA DER-encoded files (*)
  45c1250... Support reading ECDSA OpenSSH keys (*)
  44c4205... Extend ssh-store testsuite and add ECDSA test keys (*)
  660b012... Extend the asn1 test (*)
  69ed667... Extend the DER testuite for ECDSA Keys (*)
  b0a2020... Extend S-expressions test for ECDSA keys and more operation (*)
  a788bd4... Support ECDSA in ssh-agent interface (*)
  2e1973d... Basic test for ssh-agent communication and key types (*)

(*) This commit already existed in another branch; no separate mail sent