[gnome-apps-nightly] Switch polari to building from git

[Florian Müllner <fmuellner src gnome org>]

commit c0edc55df23c7bbcbfcf5f80b022511e345b9e35
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Feb 28 18:56:57 2017 +0100

    Switch polari to building from git
    
    It already ships a manifest, so no need for duplication.

 org.gnome.Polari.app  |    1 +
 org.gnome.Polari.json |   82 -------------------------------------------------
 2 files changed, 1 insertions(+), 82 deletions(-)
---
diff --git a/org.gnome.Polari.app b/org.gnome.Polari.app
index 45241e3..ae4b424 100644
--- a/org.gnome.Polari.app
+++ b/org.gnome.Polari.app
@@ -1,2 +1,3 @@
 ID=org.gnome.Polari
 JSON=org.gnome.Polari.json
+GITURL=git://git.gnome.org/polari