[simple-scan] flatpak: Make simple-scan module use builddir

[Bartosz <bkosiorek src gnome org>]

commit cb26d0ecd38e2f21bb1474593134e1aa774652f0
Author: vanadiae <vanadiae35 gmail com>
Date:   Thu Feb 11 22:50:26 2021 +0100

    flatpak: Make simple-scan module use builddir
    
    This prevents Builder from placing the .flatpak-builder directory in
    the project tree, hence keeping the git staging easier (while allowing
    centralized cache in Builder's cache directory)

 build-aux/flatpak/org.gnome.SimpleScan.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/build-aux/flatpak/org.gnome.SimpleScan.json b/build-aux/flatpak/org.gnome.SimpleScan.json
index 3bf84f69..57c86309 100644
--- a/build-aux/flatpak/org.gnome.SimpleScan.json
+++ b/build-aux/flatpak/org.gnome.SimpleScan.json
@@ -218,6 +218,7 @@
         {
             "name" : "simple-scan",
             "buildsystem" : "meson",
+            "builddir" : true,
             "sources" : [
                 {
                     "type" : "git",