[jhbuild] jhbuild: Define xdg_cache_home as a config variable

[Philip Withnall <pwithnall src gnome org>]

commit 6ec50997f53123b3d0057a71fe4b00ede1bf3654
Author: Philip Withnall <philip tecnocode co uk>
Date:   Wed May 27 23:55:39 2015 +0100

    jhbuild: Define xdg_cache_home as a config variable
    
    This shuts up the warning:
       I: unknown keys defined in configuration file: xdg_cache_home
    
    Follow up to commit 89bab4d4843ae792164ea0d6ecde405b01b0190d.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=743469

 jhbuild/config.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/jhbuild/config.py b/jhbuild/config.py
index 23b6cde..a481f6e 100644
--- a/jhbuild/config.py
+++ b/jhbuild/config.py
@@ -65,7 +65,8 @@ _known_keys = [ 'moduleset', 'modules', 'skip', 'tags', 'prefix',
                 'print_command_pattern', 'static_analyzer',
                 'module_static_analyzer', 'static_analyzer_template',
                 'static_analyzer_outputdir', 'check_sysdeps', 'system_prefix',
-                'help_website', 'conditions', 'extra_prefixes', 'disable_Werror'
+                'help_website', 'conditions', 'extra_prefixes',
+                'disable_Werror', 'xdg_cache_home',
               ]
 
 env_prepends = {}