crypto/sha1: add tests for Size() and BlockSize()
crypto/sha1: add tests for Size() and BlockSize()

R=golang-codereviews, dave
CC=golang-codereviews
https://codereview.appspot.com/46400044

Committer: Dave Cheney <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@cheney.net>

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang