dnrd: fix SRC_URI

Fixed:
ERROR: Function failed: Fetcher failure for URL:
    'http://ncu.dl.sourceforge.net/project/dnrd/dnrd/2.20.3/dnrd-2.20.3.tar.gz'.
    Unable to fetch URL from any source.

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>

meta-networking/recipes-daemons/dnrd/dnrd_2.20.3.bb

@@ -9,7 +9,7 @@ SECTION = "System Environment/Daemons"
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=0be67017f1c770313ad7b40e18d568f1"
 
-SRC_URI = "http://ncu.dl.sourceforge.net/project/${BPN}/${BPN}/${PV}/${BP}.tar.gz \
+SRC_URI = "${SOURCEFORGE_MIRROR}/${BPN}/${BP}.tar.gz \
            file://dnrd.service \
            file://dnrd.conf.sample \
            file://dnrd.init"