[gxml] Added dummy command for json

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit cf1517648acaf6cd1521863fc80250e7096677a1
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Mar 16 12:33:45 2017 -0600

    Added dummy command for json
    
    No support jet in flatpak for libraries, this is just
    for future use

 gxml.json |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gxml.json b/gxml.json
index c8ba3e4..581f27a 100644
--- a/gxml.json
+++ b/gxml.json
@@ -3,7 +3,7 @@
   "runtime": "org.gnome.Platform",
   "runtime-version": "3.22",
   "sdk": "org.gnome.Sdk",
-  "command": "",
+  "command": "gxml_test",
   "modules": [
     {
       "name": "ligee",