nfd: Add nfd-dbg package with debug symbols of nfd and other binaries

Change-Id: Ic7b37f6527e4ff34418f31f09cc33b42086f3499
Refs: #11
diff --git a/nfd/debian/control b/nfd/debian/control
index 756084b..00d863b 100644
--- a/nfd/debian/control
+++ b/nfd/debian/control
@@ -46,3 +46,12 @@
 Architecture: any
 Depends: ${misc:Depends}, nfd, nfd-status-http-server, nfd-autoreg, ndn-autoconfig-server, ndn-autoconfig-client
 Description: NFD and all related daemons
+
+Package: nfd-dbg
+Architecture: any
+Section: debug
+Priority: extra
+Depends:
+ nfd (= ${binary:Version}),
+ ${misc:Depends}
+Description: debugging symbols for nfd