Add notes on running unit tests.

git-svn-id: svn://localhost/ardour2/branches/3.0@11141 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/doc/unit_tests.txt b/doc/unit_tests.txt
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index 0000000..87ef4d2
--- /dev/null
+++ b/doc/unit_tests.txt
@@ -0,0 +1,13 @@
+Running unit tests
+------------------
+
+This is slightly neater if you have doc/waft on your path.
+
+1.  Pass --test to waf configure
+2.  cd libs/ardour
+3.  waft --targets=libardour-tests && ./run-tests.sh
+
+The "--targets=libardour-tests" is optional, but it avoids a
+rebuild of the whole gtk2_ardour (which isn't necessary for
+running the tests).
+

diff --git a/doc/waft b/doc/waft
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+++ b/doc/waft
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+#!/bin/sh
+#
+# Copyright (C) Paul Davis 2011-2012
+
+while true ; do 
+   if [ -x ./waf ] ; then
+      ./waf "$@"
+      if [ "$?" -ne "0" ]; then
+       exit 1
+      else
+       exit 0
+      fi
+   fi
+   cd ..
+   if [ `pwd` = '/' ] ; then break; fi
+done
+