rather than symlink the webm/vpx terms, use the same header as libvpx to reference in-tree files based on the discussion in: https://codereview.chromium.org/12771026/ Change-Id: Ia3067ecddefaa7ee01550136e00f7b3f086d4af4
currently the values of XMP/ICC are unused and EXIF is ignored. Change-Id: I1d8b73bde4db2768f117158f986aadbaaec45804
Change-Id: If98d0d37de34b63ac10d826150237b5f99446532