[gnome-builder] build: build VTE in nightly

[Christian Hergert <chergert src gnome org>]

commit 880958e32f50d887c548b010a9d3d5fd909fa193
Author: Christian Hergert <chergert redhat com>
Date:   Fri Nov 29 09:17:10 2019 -0800

    build: build VTE in nightly
    
    THis is no longer part of the SDK.

 build-aux/flatpak/org.gnome.Builder.json | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index 87b02e25b..c489bae05 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -248,6 +248,21 @@
                 }
             ]
         },
+        {
+            "name" : "vte",
+            "buildsystem" : "meson",
+            "build-options" : {
+                "env" : {
+                    "CXXFLAGS" : "-fno-exceptions"
+                }
+            },
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://gitlab.gnome.org/GNOME/vte.git";
+                }
+            ]
+        },
         {
             "name" : "libpeas",
             "buildsystem" : "meson",