[libpeas] Fix distcheck

[Paolo Borelli <pborelli src gnome org>]

commit 25e198482fb3d7e5811d4771addeeaab16e8a716
Author: Paolo Borelli <pborelli gnome org>
Date:   Sun Aug 21 20:06:44 2011 +0200

    Fix distcheck

 tests/Makefile.plugin |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.plugin b/tests/Makefile.plugin
index aed0484..c6c1923 100644
--- a/tests/Makefile.plugin
+++ b/tests/Makefile.plugin
@@ -11,3 +11,15 @@ all-local:
 	     fi ; \
 	   fi ; \
 	 done
+
+clean-local:
+	@test -z "$(noinst_PLUGIN)" || \
+	 for plugin in $(noinst_PLUGIN) ; do \
+	   if test -e $(builddir)/$$plugin ; then \
+	     rm -f $(builddir)/$$plugin ; \
+	     # hack to cleanup .pyc files \
+	     if test -e $(builddir)/$${plugin}c ; then \
+	       rm -f $(builddir)/$${plugin}c ; \
+	     fi ; \
+	   fi ; \
+	 done