[gnu.utils.bug] another bison Makefile nit

rfg@MCC.COM (Ron Guilmette) (04/12/89)

The commands for the install: target in the Bison Makefile
should try to "rm -f" the files bison.simple and bison.hairy
from the installation library directory before trying to copy
them there.  Elsewise, if they exist already you will get errors
from the copy commands.

// rfg