A+C: add Gabriel Aszalos (individual CLA)

LGTM=bradfitz
R=adg, bradfitz
CC=golang-codereviews
https://golang.org/cl/162580043

AUTHORS

@@ -167,6 +167,7 @@ Francisco Souza <franciscossouza@gmail.com>
 Frederick Kelly Mayle III <frederickmayle@gmail.com>
 Fredrik Enestad <fredrik.enestad@soundtrackyourbrand.com>
 Frithjof Schulze <schulze@math.uni-hannover.de> <sfrithjof@gmail.com>
+Gabriel Aszalos <gabriel.aszalos@gmail.com>
 Gary Burd <gary@beagledreams.com>
 Gautham Thambidorai <gautham.dorai@gmail.com>
 Georg Reinke <guelfey@gmail.com>

CONTRIBUTORS

@@ -241,6 +241,7 @@ Fredrik Enestad <fredrik.enestad@soundtrackyourbrand.com>
 Frithjof Schulze <schulze@math.uni-hannover.de> <sfrithjof@gmail.com>
 Fumitoshi Ukai <ukai@google.com>
 Gaal Yahas <gaal@google.com>
+Gabriel Aszalos <gabriel.aszalos@gmail.com>
 Gary Burd <gary@beagledreams.com> <gary.burd@gmail.com>
 Gautham Thambidorai <gautham.dorai@gmail.com>
 Georg Reinke <guelfey@gmail.com>