mgw: use library version of RTP_CodecPort_CtrlFunct

The .cc and the .ttcn file of RTP_CodecPort_CtrlFunct is currently
copied into the mgw directory and then used. However, those files do
exist in the /library folder as well, lets just link them using
gen_links.sh

Change-Id: I14f80051f6a168b7a8155c6e523c085e974b62b5
3 files changed