cmd/5a: removed support for R9/R10 (use m/g instead) (CL 9840043).
cmd/cgo, cmd/go: support including C++ code with cgo (CL 8248043).
+cmd/go: test coverage (CL 10413044).
+crypto/md5: Sum function to simplify hashing (CL10624044).
+crypto/sha1: Sum function to simplify hashing (CL 10571043).
+crypto/sha256: Sum256 and Sum224 functions to simplify hashing (CL 10629043).
+crypto/sha512: Sum512 and Sum384 functions to simplify hashing (CL 10630043).
crypto/tls: add support for TLS 1.1. (CL 7872043).
fmt: indexed access to arguments in Printf etc. (CL 9680043).
go/build: support including C++ code with cgo (CL 8248043).