flatpak: 1.2.4 -> 1.4.2

* Regenerated all patches for 1.4.2 and resolved
  any conflicts.

* fix-test-paths.patch doesn't copy the whole locale archive
  because we have C.UTF8 now.

* nixos/flatpak creates a Flatpak system helper user
  Change introduced in 1.3.2.

Changes:
See https://github.com/flatpak/flatpak/releases/tag/1.3.1 through
1.4.2.

pkgs/development/libraries/flatpak/fix-paths.patch

@@ -1,6 +1,8 @@
+diff --git a/session-helper/flatpak-session-helper.c b/session-helper/flatpak-session-helper.c
+index 5dd7629e..ddc71a4c 100644
 --- a/session-helper/flatpak-session-helper.c
 +++ b/session-helper/flatpak-session-helper.c
-@@ -624,7 +624,7 @@
+@@ -693,7 +693,7 @@ start_p11_kit_server (const char *flatpak_dir)
    g_auto(GStrv) stdout_lines = NULL;
    int i;
    char *p11_argv[] = {
@@ -9,7 +11,7 @@
      /* We explicitly request --sh here, because we then fail on earlier versions that doesn't support
       * this flag. This is good, because those earlier versions did not properly daemonize and caused
       * the spawn_sync to hang forever, waiting for the pipe to close.
-@@ -770,7 +770,7 @@
+@@ -836,7 +836,7 @@ main (int    argc,
        exit (1);
      }