[gnome-sdk-images] librsvg: enable vala bindings

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ce655059fb531fa6271dd6b35d94e210a391cab0
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Mon Jun 4 15:07:16 2018 -0500

    librsvg: enable vala bindings
    
    They are missing and lots of apps fail without them.

 org.gnome.Sdk.json.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index 9a4df6f..b76366c 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -393,7 +393,7 @@
         },
         {
             "name": "librsvg",
-            "config-opts": ["--disable-static"],
+            "config-opts": ["--disable-static", "--enable-vala"],
             "ensure-writable": ["/lib/*/gdk-pixbuf-2.0/*/loaders.cache"],
             "sources": [
                 {