Please fix Makefile.in or add gmake to the package

Dear Scsh maintainer(s),

When compiling 0.6.6, there a problem if you use the default OpenBSD
make.

You'll get the error:
Using $< in a non-suffix rule context is a GNUmake idiom (line 942 of Makefile)

Here's my fix:

diff Makefile.in Makefile.in.fixed
942c942
<             -e 's|@scsh_LDFLAGS@|$(LDFLAGS)|g'  $< > $@
---
>             -e 's|@scsh_LDFLAGS@|$(LDFLAGS)|g'  scsh/configure.scm.in > $@

Heath