[release-branch.go1] C: add Peter Weinberger (Google CLA)

««« backport b9b0c8d8b5ff
C: add Peter Weinberger (Google CLA)

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5976059
»»»

CONTRIBUTORS

@@ -234,6 +234,7 @@ Peter Froehlich <peter.hans.froehlich@gmail.com>
 Peter McKenzie <petermck@google.com>
 Peter Mundy <go.peter.90@gmail.com>
 Péter Szabó <pts@google.com>
+Peter Weinberger <pjw@golang.org>
 Peter Williams <pwil3058@gmail.com>
 Phil Pennock <pdp@golang.org>
 Pieter Droogendijk <pieter@binky.org.uk>