Fix makefile issues from 1.5

[MatthewWhiting]

A couple of issues cropped up in the Makefile/installation for v1.5. Importantly, this bit:

install :
        $(INSTALL) -d -m 2755 $(INSTALLDIR)
        $(INSTALL) -m 755 $(EXEC) $(INSTALLDIR)
        $(RM) $(INSTALLDIR)/$(EXEC-STUB)
        cd $(INSTALLDIR) && $(LN_S) $(EXEC) $(EXEC-STUB)
        -test ! -f $(LIB) || $(INSTALL) -d -m 2755 $(LIBDIR)
        -test ! -f $(LIB) || $(INSTALL) -m 644 $(LIB) $(LIBDIR)
        -test ! -f $(LIB) || cd $(LIBDIR) && $(RM) $(LIB_LN) && $(LN_S) $(LIB) $(LIB_LN)
        -test ! -f $(LIBSO) || $(INSTALL) -m 755 $(LIBSO) $(LIBDIR) && \
                if [ "" != "" ] ; then \
                        cd $(LIBDIR) && $(RM) $(LIBSO_LN) && $(LN_S) $(LIBSO) $(LIBSO_LN); \
                fi

-- the logic here is a bit wrong.

Also, the link to the static library is undefined:

LIBSO = libduchamp.1.5.dylib
LIBSO_LN =

This is set in the configure script.

[MatthewWhiting]

Fixed in [1292]: Makefile now reads:

install :
        $(INSTALL) -d -m 2755 $(INSTALLDIR)
        $(INSTALL) -m 755 $(EXEC) $(INSTALLDIR)
        $(RM) $(INSTALLDIR)/$(EXEC-STUB)
        cd $(INSTALLDIR) && $(LN_S) $(EXEC) $(EXEC-STUB)
        -test ! -f $(LIB) || $(INSTALL) -d -m 2755 $(LIBDIR)
        -test ! -f $(LIB) || $(INSTALL) -m 644 $(LIB) $(LIBDIR)
        -test ! -f $(LIB) || ( cd $(LIBDIR) && $(RM) $(LIB_LN) && $(LN_S) $(LIB) $(LIB_LN) )
        -test ! -f $(LIBSO) || ( $(INSTALL) -m 755 $(LIBSO) $(LIBDIR) && \
                if [ "libduchamp.dylib" != "" ] ; then \
                        cd $(LIBDIR) && $(RM) $(LIBSO_LN) && $(LN_S) $(LIBSO) $(LIBSO_LN); \
                fi )

and the configure script directly defines SHRLN