Changed crypto/sha256/sha256.go to use the cache for special cases
Changed crypto/sha256/sha256.go to use the cache for special cases

rachtsingh/gogojuice,rachtsingh/gogojuice,rachtsingh/gogojuice,rachtsingh/gogojuice,rachtsingh/gogojuice,rachtsingh/gogojuice,rachtsingh/gogojuice,rachtsingh/gogojuice