libopenwebrtc.exp: Add missing new API symbol
libopenwebrtc.exp: Add missing new API symbol

Closes #676

EricssonResearch/openwebrtc,pererikb/openwebrtc,pererikb/openwebrtc,EricssonResearch/openwebrtc,pererikb/openwebrtc,pererikb/openwebrtc,EricssonResearch/openwebrtc,EricssonResearch/openwebrtc,EricssonResearch/openwebrtc,pererikb/openwebrtc,pererikb/openwebrtc,EricssonResearch/openwebrtc,EricssonResearch/openwebrtc,pererikb/openwebrtc