[evince/wip/hadess/unrar-libarchive] flatpak: Add libarchive 3.6.0 build

[Germán Poo-Caamaño <gpoo src gnome org>]

commit ee8508c302e68bc60939711ca7894f837bedac14
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Tue Mar 1 18:08:48 2022 -0300

    flatpak: Add libarchive 3.6.0 build
    
    The comic backends now requires libarchive 3.6.0, which is not currently
    available in the SDK. Therefore, we build it to enable comic support
    in flatpak Evince.

 build-aux/flatpak/org.gnome.Evince.json | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/build-aux/flatpak/org.gnome.Evince.json b/build-aux/flatpak/org.gnome.Evince.json
index 45d0dd70b..9a02d9fb8 100644
--- a/build-aux/flatpak/org.gnome.Evince.json
+++ b/build-aux/flatpak/org.gnome.Evince.json
@@ -169,6 +169,19 @@
                 }
             ]
         },
+        {
+            "name": "libarchive",
+            "cleanup": [
+                "/bin"
+            ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://libarchive.org/downloads/libarchive-3.6.0.tar.xz";,
+                    "sha256": "df283917799cb88659a5b33c0a598f04352d61936abcd8a48fe7b64e74950de7"
+                }
+            ]
+        },
         {
             "name": "gnome-desktop",
             "buildsystem": "meson",