[metacity] update toplevel Makefile.am

[Alberts Muktupāvels <muktupavels src gnome org>]

commit e0baee288bb5a9c5b0d08e01cecd2dbac0e8d0cd
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Sep 20 01:32:15 2015 +0300

    update toplevel Makefile.am

 Makefile.am |   31 ++++++++++++++++---------------
 1 files changed, 16 insertions(+), 15 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index d20232a..d26ab6f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,28 +1,29 @@
+NULL =
+
 SUBDIRS = \
+       doc \
        src \
        po \
-       doc
+       $(NULL)
 
 EXTRA_DIST = \
+       AUTHORS \
+       COPYING \
        HACKING \
-       rationales.txt
+       README \
+       rationales.txt \
+       $(NULL)
 
 MAINTAINERCLEANFILES = \
+       $(GITIGNORE_MAINTAINERCLEANFILES_TOPLEVEL) \
+       $(GITIGNORE_MAINTAINERCLEANFILES_MAKEFILE_IN) \
+       $(GITIGNORE_MAINTAINERCLEANFILES_M4_LIBTOOL) \
+       `find "m4" -type f -name "*.m4" -print` \
        $(srcdir)/INSTALL \
-       $(srcdir)/aclocal.m4 \
-       $(srcdir)/compile \
-       $(srcdir)/config.guess \
-       $(srcdir)/config.h.in \
        $(srcdir)/config.h.in~ \
-       $(srcdir)/config.sub \
-       $(srcdir)/depcomp \
-       $(srcdir)/install-sh \
-       $(srcdir)/ltmain.sh \
-       $(srcdir)/missing \
-       `find "$(srcdir)" -type f -name Makefile.in -print` \
-       $(srcdir)/configure
+       $(srcdir)/configure \
+       $(NULL)
 
-GITIGNOREFILES = \
-       $(PACKAGE)-\*.tar.{gz,bz2,xz}
+GITIGNOREFILES = $(PACKAGE)-\*.tar.{gz,bz2,xz}
 
 -include $(top_srcdir)/git.mk