chat/coyim: Fixes the broken build.

Remove the missing accel_flags for now from gotk3 vendor library.

chat/coyim/distinfo

@@ -1,6 +1,7 @@
-$NetBSD: distinfo,v 1.1 2019/04/24 23:43:22 fox Exp $
+$NetBSD: distinfo,v 1.2 2021/04/07 13:11:14 fox Exp $
 
 SHA1 (coyim-0.3.11.tar.gz) = 3928e9954f516a7725982390fdb7ceef0659ec0a
 RMD160 (coyim-0.3.11.tar.gz) = 32b3e81e808951faacc63efaa19ba0d0d5318a93
 SHA512 (coyim-0.3.11.tar.gz) = a9d3b9900e78f736617969d4c2ebcb88abbb427dccc0396ed5a655f8ae0d22c3ddba44bdd4e0b4370af97972e883e9ee52b425cbfa226945c6aad7a2a473accb
 Size (coyim-0.3.11.tar.gz) = 3803018 bytes
+SHA1 (patch-vendor_github.com_gotk3_gotk3_gtk_accel.go) = 7be97c79ed53a517c1bb57010f2e4e9a59e623ad

chat/coyim/patches/patch-vendor_github.com_gotk3_gotk3_gtk_accel.go

@@ -0,0 +1,24 @@
+$NetBSD: patch-vendor_github.com_gotk3_gotk3_gtk_accel.go,v 1.1 2021/04/07 13:11:14 fox Exp $
+
+Remove the missing accel_flags field to prevent build failure.
+
+XXX: Investigate this further.
+
+--- vendor/github.com/gotk3/gotk3/gtk/accel.go.orig	2021-04-07 12:06:33.563048146 +0000
++++ vendor/github.com/gotk3/gotk3/gtk/accel.go
+@@ -244,7 +244,6 @@ func (v *AccelKey) native() *C.struct__G
+ 	var val C.struct__GtkAccelKey
+ 	val.accel_key = C.guint(v.key)
+ 	val.accel_mods = C.GdkModifierType(v.mods)
+-	val.accel_flags = v.flags
+ 	return &val
+ }
+ 
+@@ -253,7 +252,6 @@ func wrapAccelKey(obj *C.struct__GtkAcce
+ 
+ 	v.key = uint(obj.accel_key)
+ 	v.mods = gdk.ModifierType(obj.accel_mods)
+-	v.flags = uint16(obj.accel_flags)
+ 
+ 	return &v
+ }