Move importlib.test.benchmark to Tools/importbench to make it more
visible and to place it with other micro-benchmarks (e.g.
stringbench).
diff --git a/Tools/importbench/README b/Tools/importbench/README
new file mode 100644
index 0000000..81a5544
--- /dev/null
+++ b/Tools/importbench/README
@@ -0,0 +1,6 @@
+Importbench is a set of micro-benchmarks for various import scenarios.
+
+It should not be used as an overall benchmark of import performance, but rather
+an easy way to measure impact of possible code changes. For a real-world
+benchmark of import, use the normal_startup benchmark from
+hg.python.org/benchmarks.