Remove linked libraries from Makefile. They break rebuilds from srpms on some
architectures. The linker flags are supplied from the spec.

Author: Jan Synacek <jsynacek@redhat.com>
RH-Bugzilla: #825153

--- Makefile.orig	2012-09-11 08:29:18.965821127 +0200
+++ Makefile	2012-09-11 08:29:29.391803358 +0200
@@ -31,7 +31,7 @@
 
 all: numad
 
-numad: numad.o -lpthread -lrt
+numad: numad.o
 
 AR ?= ar
 RANLIB ?= ranlib