[rhythmbox] add missing makefile.am

[Jonathan Matthew <jmatthew src gnome org>]

commit 57294128f7883e60d1f12884790643f3d38f6cdc
Author: Jonathan Matthew <jonathan d14n org>
Date:   Tue Sep 4 20:45:04 2012 +1000

    add missing makefile.am

 sample-plugins/Makefile.am |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/sample-plugins/Makefile.am b/sample-plugins/Makefile.am
new file mode 100644
index 0000000..12611eb
--- /dev/null
+++ b/sample-plugins/Makefile.am
@@ -0,0 +1,9 @@
+SUBDIRS = sample
+
+if ENABLE_PYTHON
+SUBDIRS += sample-python
+endif
+
+if ENABLE_VALA
+SUBDIRS += sample-vala
+endif