Rewrite makefile to link with stl statically

By doing this way, webrtc.so doesn't depend on stlport_shared

BUG=
TEST=
Review URL: https://webrtc-codereview.appspot.com/546005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@2170 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed