floating point perf improvement in CopyNativeVertexData In the CopyNativeVertexData template function, in the else clause use memcpy/memset rather than for loops. This is a performance improvment for floating point versions of CopyNativeVertexData, particularly on 32-bit Firefox, where the -arch:IA32 compiler option used cause the compiler to generate fld/fstp operations inside the for loops. Update AUTHORS & CONTRIBUTORS to include AMD. BUG=angleproject:1317 Change-Id: I7133fc476028284f56783f4e2f9e2395f6227514 Reviewed-on: https://chromium-review.googlesource.com/327590 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>