* Makefile.in ($(LIBNETTLE_FORLINK)): Always create a .lib symlink

to the library file. Use LN_S.
($(LIBHOGWEED_FORLINK)): Likewise.

* configure.ac: Use AC_PROG_LN_S.
* config.make.in (LN_S): New substitution.

Rev: nettle/Makefile.in:1.43
Rev: nettle/config.make.in:1.7
Rev: nettle/configure.ac:1.54