unused kernel functions (SHA3, etc.)

[maya%netbsd.org@localhost]

On Thu, Nov 30, 2017 at 05:47:25AM +0000, Taylor R Campbell wrote:
> Module Name:	src
> Committed By:	riastradh
> Date:		Thu Nov 30 05:47:24 UTC 2017
> 
> Modified Files:
> 	src/common/lib/libc: Makefile.inc
> 	src/lib/libc/hash: Makefile.inc
> 	src/lib/libc/include: namespace.h
> 	src/sys/lib/libkern: Makefile.libkern
> 	src/sys/sys: Makefile
> Added Files:
> 	src/common/lib/libc/hash/sha3: keccak.c keccak.h sha3.c
> 	src/lib/libc/hash/sha3: Makefile.inc
> 	src/sys/sys: sha3.h
> 
> Log Message:
> Import SHA-3 code into libc and libkern.
> 
> No new public symbols in libc, but publishing the symbols is a simple
> matter if/when we decide to do so.
> 

This adds unused code to some very space-starved kernels.