Importing usr.bin/hexdump

Replaces commands/hexdump as well as commands/od.
No Minix-specific changes were needed.

test/testsh2.sh was modified to match the spacing
used in the output of the NetBSD

Importing usr.bin/hexdump

Replaces commands/hexdump as well as commands/od.
No Minix-specific changes were needed.

test/testsh2.sh was modified to match the spacing
used in the output of the NetBSD od command.

Change-Id: I65ee1d30e8cdd546097462df7c38c2d38f3e891d

show more ...