* Add support to ARM64 configuration for win32 build
* Add changes notes to webrtc and webrtc_aec3 third party sources
* Remove reference to libwebrtc_aec3 from libpjproject. Add reference it manually if libwebrtc_aec3 is needed.
* Fix build error on Release configuration.
- Modify some project files for x64 build.
- Add some files/folder to the global ignore list.
- Disable PJ_OS_HAS_CHECK_STACK as default.
- Use ip_helper_generic.c which provides implementation to pj_enum_ip_interface() and pj_enum_ip_route().
git-svn-id: https://svn.pjsip.org/repos/pjproject/branches/projects/uwp@5470 74dad513-b988-da41-8d7b-12977e46ad98