tests: Add README into this directory

Explains that, despite the name, this directory doesn't contain any
tests.

Updates: commit fca1778

Author: rwmjones

tests/Makefile.am

@@ -15,8 +15,6 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-# This file is (almost) empty since this directory is only needed so
-# we have somewhere to put the tests/function.sh{,.in} file.  The
-# actual tests are placed into the directories of each tool.
+EXTRA_DIST = README.txt
 
 include $(top_srcdir)/subdir-rules.mk

tests/README.txt

@@ -0,0 +1,6 @@
+This directory is only needed to provide a place for the
+tests/functions.sh{,.in} file, which is included from all of the
+tests.
+
+The actual tests are placed into each tool directory.  For example,
+look in inspector/test-*.sh for virt-inspector tests.