spec: update path to trusted CA store to /etc/pki/tls/cert.pem (rh #1236548)

The code change dealing with it will be pushed to dist-git later with 1.0.4 release
(or new snapshot).

(cherry picked from commit 59e92f03e8)

NetworkManager.spec

@@ -424,7 +424,7 @@ intltoolize --force
 	--with-suspend-resume=systemd \
 	--with-systemdsystemunitdir=%{systemd_dir} \
 	--with-udev-dir=%{udev_dir} \
-	--with-system-ca-path=/etc/pki/tls/certs \
+	--with-system-ca-path=/etc/pki/tls/cert.pem \
 	--with-tests=yes \
 	--with-valgrind=no \
 	--enable-ifcfg-rh=yes \