[glib] build: Fix build with srcdir ≠ builddir

[Philip Withnall <pwithnall src gnome org>]

commit 181b58c46dc5ad76876b1a77ef59651ad4dfd04b
Author: Philip Withnall <withnall endlessm com>
Date:   Wed Oct 11 10:52:44 2017 +0100

    build: Fix build with srcdir ≠ builddir
    
    Broken by commit a71f51dece83b3da7e8fe284f4383592fba4d184. My fault for
    not reviewing thoroughly enough.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 gio/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/Makefile.am b/gio/Makefile.am
index d2711e1..dbc8cbb 100644
--- a/gio/Makefile.am
+++ b/gio/Makefile.am
@@ -100,7 +100,7 @@ GDBUS_PYTHON_DEPS =                                         \
        $(srcdir)/gdbus-2.0/codegen/codegen.py          \
        $(srcdir)/gdbus-2.0/codegen/__init__.py         \
        $(srcdir)/gdbus-2.0/codegen/dbustypes.py        \
-       $(srcdir)/gdbus-2.0/codegen/config.py           \
+       $(builddir)/gdbus-2.0/codegen/config.py         \
        $(srcdir)/gdbus-2.0/codegen/utils.py
 
 gdbus-daemon-generated.h gdbus-daemon-generated.c: $(srcdir)/dbus-daemon.xml $(GDBUS_PYTHON_DEPS)