tools: apply linting to custom rules code

Apply our eslint rules to the code for our custom eslint rules.

Eslint Inception! Maybe. I never saw that movie...

PR-URL: https://github.com/nodejs/node/pull/3195
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Roman Reiss <me@silverwind.io>

Makefile

@@ -505,7 +505,8 @@ bench-idle:
 	$(NODE) benchmark/idle_clients.js &
 
 jslint:
-	$(NODE) tools/eslint/bin/eslint.js src lib test --rulesdir tools/eslint-rules --reset --quiet
+	$(NODE) tools/eslint/bin/eslint.js src lib test tools/eslint-rules \
+		--rulesdir tools/eslint-rules --reset --quiet
 
 CPPLINT_EXCLUDE ?=
 CPPLINT_EXCLUDE += src/node_lttng.cc

tools/eslint-rules/require-buffer.js

@@ -12,5 +12,5 @@ module.exports = function(context) {
         }
       });
     }
-  }
+  };
-}
+};

vcbuild.bat

@@ -246,7 +246,7 @@ goto jslint
 :jslint
 if not defined jslint goto exit
 echo running jslint
-%config%\node tools\eslint\bin\eslint.js src lib test --rulesdir tools\eslint-rules --reset --quiet
+%config%\node tools\eslint\bin\eslint.js src lib test tools\eslint-rules --rulesdir tools\eslint-rules --reset --quiet
 goto exit
 
 :create-msvs-files-failed