tools: no trailing slash in ignore patterns

Makes eslint exclude directories without enumerating their content

PR-URL: #16372
Refs: #16010
Refs: #16278
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: refack

.eslintignore

@@ -1,10 +1,10 @@
 lib/internal/v8_prof_polyfill.js
 lib/punycode.js
-test/addons/??_*/
+test/addons/??_*
 test/fixtures
-test/tmp*/
+test/tmp*
 tools/eslint
 tools/icu
 node_modules
-benchmark/tmp/
+benchmark/tmp
 doc/**/*.js