Often intermediate results of poly1305 calculations are only reduced to the range [0, 2^130). These new test vectors exercise the code that reduces the final output to the range [0, 2^130-5). This improves the test coverage of CL 35294 and CL 32812. Change-Id: Ifd2f64d4668c08a396ed81db3e88969a49baf777 Reviewed-on: https://go-review.googlesource.com/35918 Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Adam Langley <agl@golang.org>