Moved sim/ to test/simulator

All test code will be in test/. The simulator will be a subdirectory and
separate for all of the other unit test code.

Change-Id: I18c787c8180a93e09b91c74968284062391d915d
diff --git a/test/meson.build b/test/meson.build
new file mode 100644
index 0000000..6cc59ae
--- /dev/null
+++ b/test/meson.build
@@ -0,0 +1,3 @@
+# build simulator
+subdir('simulator')
+