Support Darwin8 properly.

Patch by Kito.

http://bugs.gentoo.org/99143

--- support/shobj-conf
+++ support/shobj-conf
@@ -146,7 +146,7 @@
 	SHLIB_LIBSUFF='dylib'
 
 	case "${host_os}" in
-	darwin7*)	SHOBJ_LDFLAGS=''
+	darwin[78]*)	SHOBJ_LDFLAGS=''
 			SHLIB_XLDFLAGS='-dynamiclib -arch_only `/usr/bin/arch` -install_name $(libdir)/$@ -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR) -v'
 			;;
 	*)		SHOBJ_LDFLAGS='-dynamic'