[gnome-builder] flatpak: Don't install to /etc in libfuse

[Philip Chimento <pchimento src gnome org>]

commit e888a5a66791b79b313d14133e36aba2fa32ca81
Author: Philip Chimento <philip endlessm com>
Date:   Fri Mar 10 18:27:48 2017 -0800

    flatpak: Don't install to /etc in libfuse
    
    This should probably be /app/etc, without this change the build fails due
    to trying to write to /etc without permission.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779885

 org.gnome.Builder.json |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/org.gnome.Builder.json b/org.gnome.Builder.json
index fd3564a..520f364 100644
--- a/org.gnome.Builder.json
+++ b/org.gnome.Builder.json
@@ -66,6 +66,10 @@
         {
             "name": "libfuse",
             "cleanup": [ "/bin" ],
+            "config-opts": [
+                "UDEV_RULES_PATH=/app/etc/udev/rules.d",
+                "INIT_D_PATH=/app/etc/init.d"
+            ],
             "sources": [
                 {
                     "type": "archive",