[gtk-doc] make: ignore pycache dirs

[Stefan Sauer <stefkost src gnome org>]

commit 296016451415d149d02f7207c9bc60bd00bf3fc6
Author: Stefan Sauer <ensonic users sf net>
Date:   Fri Jun 2 09:22:01 2017 +0200

    make: ignore pycache dirs

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index f351a5e..f53a7b1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -126,7 +126,7 @@ MAINTAINERCLEANFILES = \
        ChangeLog-?.?? \
        gtk-doc-*.tar.xz \
        build-aux \
-       gtkdoc/__pycache__ tests/__pycache__
+       __pycache__ gtkdoc/__pycache__ tests/__pycache__
 
 -include $(top_srcdir)/git.mk