go.*: bump gio version

Fixes a crash when using the app in multi-window mode.

Updates tailscale/tailscale#431

Signed-off-by: Elias Naur <mail@eliasnaur.com>

go.mod

@@ -3,7 +3,7 @@ module tailscale.com/tailscale-android
 go 1.14
 
 require (
-	gioui.org v0.0.0-20200610182036-5fe3785bbd88
+	gioui.org v0.0.0-20200611133933-6d5fbcba3f21
 	gioui.org/cmd v0.0.0-20200530141830-d2c67cdf8039
 	github.com/tailscale/wireguard-go v0.0.0-20200515231107-62868271d710
 	golang.org/x/exp v0.0.0-20191002040644-a1355ae1e2c3

go.sum

@@ -1,8 +1,8 @@
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 gioui.org v0.0.0-20200530124200-1377bea3cdc5/go.mod h1:AHI9rFr6AEEHCb8EPVtb/p5M+NMJRKH58IOp8O3Je04=
-gioui.org v0.0.0-20200610182036-5fe3785bbd88 h1:hZP3B7SMDTNb4/+A9Nbqgau2tw6B2+D8ctirTYxsmvA=
-gioui.org v0.0.0-20200610182036-5fe3785bbd88/go.mod h1:AHI9rFr6AEEHCb8EPVtb/p5M+NMJRKH58IOp8O3Je04=
+gioui.org v0.0.0-20200611133933-6d5fbcba3f21 h1:VFB+0QxUPABMgEarfyJeHQvUNc++9TASnDVXcFgxLcA=
+gioui.org v0.0.0-20200611133933-6d5fbcba3f21/go.mod h1:AHI9rFr6AEEHCb8EPVtb/p5M+NMJRKH58IOp8O3Je04=
 gioui.org/cmd v0.0.0-20200530141830-d2c67cdf8039 h1:mO1CTk+PwcDQGMXpN1JJiFflYBvwqSQ6+3Gvp64IKHo=
 gioui.org/cmd v0.0.0-20200530141830-d2c67cdf8039/go.mod h1:B1g+HOceSj7g3S4Yao3skwInTpcK978KANys5YuapMc=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=