mdnsresponder: bring back LN hack

It turns out that the Makefile of mdnsreponder links to absolute paths
instead of relative ones. This is an issue when compiling.

Fix for InstallDev as well.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/mdnsresponder/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mDNSResponder
 PKG_VERSION:=IETF104
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=mDNSResponder-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://opensource.apple.com/tarballs/mDNSResponder/IETF/
@@ -124,7 +124,8 @@ define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include
 	$(CP) $(PKG_INSTALL_DIR)/usr/include/dns_sd.h $(1)/usr/include/
 	$(INSTALL_DIR) $(1)/usr/lib
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libdns_sd.so* $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libdns_sd.so.1 $(1)/usr/lib/
+	$(LN) -s libdns_sd.so.1 $(1)/usr/lib/libdns_sd.so
 endef
 
 define Package/mdns-utils/install
@@ -152,7 +153,8 @@ define Package/mdnsd/install
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) ./files/mdnsd.init $(1)/etc/init.d/mdnsd
 	$(INSTALL_DIR) $(1)/usr/lib/
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libdns_sd.so* $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libdns_sd.so.1 $(1)/usr/lib/
+	$(LN) -s libdns_sd.so.1 $(1)/usr/lib/libdns_sd.so
 endef
 
 define Package/mdnsresponder/install