[pitivi] flatpak: Add yelp-xslt

[Thibault Saunier <tsaunier src gnome org>]

commit 542a0a57e3e279e6fa01383d318c7ec6052d7c40
Author: Thibault Saunier <tsaunier gnome org>
Date:   Mon Jun 6 09:47:43 2016 -0400

    flatpak: Add yelp-xslt
    
    otherwize yelp will not work when using the repo as some xslt are part of the Sdk only

 build/flatpak/pitivi.template.json |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/build/flatpak/pitivi.template.json b/build/flatpak/pitivi.template.json
index d9ab8f3..75c66a1 100644
--- a/build/flatpak/pitivi.template.json
+++ b/build/flatpak/pitivi.template.json
@@ -219,6 +219,18 @@
             ]
         },
         {
+            "name": "yelp-xsl",
+            "cleanup-platform": [ "*"  ],
+            "config-opts": ["--disable-doc"],
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "git://git.gnome.org/yelp-xsl",
+                    "branch": "3.20.1"
+                }
+            ]
+        },
+        {
             "name": "yelp",
             "sources": [
                 {