[gimp] build/win: Fix building 64-bit gtk2

[Michael Henning <mhenning src gnome org>]

commit ddd48f6e0bbf0cb6c3f1eb3f4e80d412029ec64f
Author: Michael Henning <drawoc darkrefraction com>
Date:   Fri Nov 15 20:26:04 2013 -0500

    build/win: Fix building 64-bit gtk2

 build/windows/jhbuild/gtk+.moduleset |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/build/windows/jhbuild/gtk+.moduleset b/build/windows/jhbuild/gtk+.moduleset
index c32dd6b..b9ac8f9 100644
--- a/build/windows/jhbuild/gtk+.moduleset
+++ b/build/windows/jhbuild/gtk+.moduleset
@@ -157,7 +157,7 @@
        </dependencies>
 </autotools>
 
-<autotools id="gtk2" autogen-sh="configure" makeinstallargs="install -j1">
+<autotools id="gtk2" autogen-sh="|| rm -f gtk/gtk.def; ./configure" makeinstallargs="install -j1">
        <branch version="2.24.22" repo="gnome.org"
                        module="gtk+/2.24/gtk+-2.24.22.tar.xz"
                        hash="sha256:b114b6e9fb389bf3aa8a6d09576538f58dce740779653084046852fb4140ae7f">