libndpi: v1.5.1 bump, cleanups


git-svn-id: http://pentoo.googlecode.com/svn@6111 04556701-5d27-2e10-b29c-201e0903c0fa
libndpi: fix system path because all tools look in /usr/lib/libndpi/ path


git-svn-id: http://pentoo.googlecode.com/svn@6112 04556701-5d27-2e10-b29c-201e0903c0fa