[gnome-sdk-images] Revert "Use librsvg from Freedesktop SDK"

[Jordan Petridis <jpetridis src gnome org>]

commit 3c8e630a8f9fc00d120b09994bb0fc94fd341af7
Author: Jordan Petridis <jpetridis gnome org>
Date:   Sun Sep 9 14:00:02 2018 +0300

    Revert "Use librsvg from Freedesktop SDK"
    
    This reverts commit abbc72bcf40459f0469274106a94fbf842dbf170.
    
    Librsvg from the Freedesktop Sdk is missing the Vala API atm.
    Reverting this till its fixed.

 org.gnome.Sdk.json.in | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index fd7444a..c3d6a61 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -398,6 +398,18 @@
                 }
             ]
         },
+        {
+            "name": "librsvg",
+            "config-opts": ["--disable-static", "--enable-vala"],
+            "ensure-writable": ["/lib/*/gdk-pixbuf-2.0/*/loaders.cache"],
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://gitlab.gnome.org/GNOME/librsvg.git";,
+                    "branch": "librsvg-2-40"
+                }
+            ]
+        },
         {
             "name": "gtk2",
             "config-opts": ["--disable-man",