go.mod: update to latest golang.org/x/sys

This will add support for several newly added GOOS/GOARCH combinations,
e.g. netbsd/arm64.

Change-Id: I730be84e9067b3f6d0a3020d4a512975e227e718
Reviewed-on: https://go-review.googlesource.com/c/term/+/273347
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/go.mod b/go.mod
index e522191..d45f528 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@
 
 go 1.11
 
-require golang.org/x/sys v0.0.0-20191026070338-33540a1f6037
+require golang.org/x/sys v0.0.0-20201119102817-f84b799fce68
diff --git a/go.sum b/go.sum
index 5e0752b..de9e09c 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=