Only use ld -R flag in UW 7.1*, since it's new.

Author: petere

src/makefiles/Makefile.unixware

@@ -1,6 +1,8 @@
 AROPT = crs
 export_dynamic = -Wl,-Bexport
+ifneq (,$(findstring uw7.1, $(host_os)))
 rpath = -Wl,-R$(libdir)
+endif
 DLSUFFIX = .so
 ifeq ($(GCC), yes)
 CFLAGS_SL = -fpic