More robust cycle1 test w.r.t. stale artifacts.

Author: cristianoc

jscomp/build_tests/cycle1/input.js

@@ -5,6 +5,8 @@ const fs = require('fs')
 const path = require('path')
 var rescript_exe = require("../../../scripts/bin_path").rescript_exe
 
+cp.execSync(`${rescript_exe} clean -with-deps`, { cwd: __dirname, });
+
 var output = cp.spawnSync(rescript_exe, { encoding: "utf8", shell: true });
 
 assert(/is dangling/.test(output.stdout));