Add taint.js presence test.

diff --git a/src/tests/full.taint_js b/src/tests/full.taint_js
new file mode 120000 (symlink)
index 0000000..1ad99e1
--- /dev/null
+++ b/src/tests/full.taint_js
@@ -0,0 +1 @@
+../templates/taint.js
\ No newline at end of file