[[rdkb][common][app][Fix ccsp-dhcp-mgr build failed]

[Description]
Fix ccsp-dhcp-mgr build failed.

[Release-log]
N/A

Change-Id: Iee35c1117e394b6592b0468f8365cba06968ca33
diff --git a/recipes-ccsp/ccsp/ccsp-dhcp-mgr.bbappend b/recipes-ccsp/ccsp/ccsp-dhcp-mgr.bbappend
index 5bf31da..217706e 100644
--- a/recipes-ccsp/ccsp/ccsp-dhcp-mgr.bbappend
+++ b/recipes-ccsp/ccsp/ccsp-dhcp-mgr.bbappend
@@ -2,9 +2,10 @@
 
 EXTRA_OECONF_append_dunfell  = " --with-ccsp-arch=arm"
 CFLAGS_append_kirkstone = " -fcommon "
+LDFLAGS_append = " -lnanomsg "
 
 do_install_append() {
     if ${@bb.utils.contains('DISTRO_FEATURES', 'dhcp_manager', 'false', 'true', d)}; then
         rm -rf ${D}${systemd_unitdir}/
     fi
-}
\ No newline at end of file
+}