[folks] Don't delete in-tree m4 macros when doing maintainer-clean

[Philip Withnall <pwithnall src gnome org>]

commit ffe48b93225ffb30f7c60b0643aef0547f30afd0
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Sun Dec 12 11:09:12 2010 +0000

    Don't delete in-tree m4 macros when doing maintainer-clean

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index e5bbc18..9537d3c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -46,7 +46,7 @@ MAINTAINERCLEANFILES = \
 	$(srcdir)/mkinstalldirs \
 	$(srcdir)/ChangeLog \
 	`find "$(srcdir)" -type f -name Makefile.in -print` \
-	`find "m4" -type f -name "*.m4" -print` \
+	`find "m4" -type f -name "*.m4" ! -name "as-compiler-flag.m4" ! -name "introspection.m4" ! -name "vala.m4" -print` \
 	po/Makevars.template \
 	po/Rules-quot \
 	po/boldquot.sed \