getdns: fix library double packing

Signed-off-by: Alexander Ryzhov <github@ryzhov-al.ru>

libs/getdns/Makefile

@@ -6,7 +6,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=getdns
 PKG_VERSION:=1.5.2
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE
@@ -72,7 +72,7 @@ endef
 
 define Package/getdns/install
 	$(INSTALL_DIR) $(1)/usr/lib
-	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/libgetdns.so.* $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libgetdns.so.* $(1)/usr/lib/
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/getdns_query $(1)/usr/sbin/getdns_query
 endef