d72f730211 hashes: Use $crate in internal macros (Tobin C. Harding)
Pull request description:
These are only called from within the crate but it is still more correct to use `$crate` and saves this from biting us later if we copy the code someplace else.
Internal change only.
ACKs for top commit:
Kixunil:
ACK d72f730211
apoelstra:
ACK d72f730211 successfully ran local tests
Tree-SHA512: d278643c3fbeb28ca377ebf59958054dd2893c46b48469e03a8c7517c5b0b33271de061ae662c400d45962724fe4d13cada41fd5b839a1ff784521ac69c9db72