Makefile.am cleanup

 - remove unused stuff
 - add --quiet flag to libtool
 - avoid building some tests programs when tests are not enabled

Change-Id: Ie34aeec1a598ad811256a00354f66cfddae9d0b9
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/Makefile.am b/src/Makefile.am
index bba90ea..18a41a1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -17,6 +17,7 @@
 
 AUTOMAKE_OPTIONS = foreign subdir-objects
 ACLOCAL_AMFLAGS = -I m4
+AM_LIBTOOLFLAGS = --quiet
 
 AM_CFLAGS = -Wall