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This rolls to a version of our mesa library that does not have the
CL, GLES2, EGL or VG headers.  We should never use CL/VG headers, we
should always use GLES2 and EGL headers from khronos.

Review URL: https://codereview.chromium.org/612523002

Cr-Commit-Position: refs/heads/master@{#297201}