refactor(benchmarks): rename paths.js into register_system.js to match other benchmarks

modules/benchmarks/src/compiler/bp.conf.es5

@@ -4,7 +4,7 @@ module.exports = function(config) {
       {src: '/js/traceur-runtime.js'},
       {src: '/js/es6-module-loader-sans-promises.src.js'},
       {src: '/js/extension-register.js'},
-      {src: 'paths.js'},
+      {src: 'register_system.js'},
       {src: 'https://ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.js'},
       {src: 'benchmark.js'}
     ]

modules/benchmarks/src/compiler/register_system.es5

@@ -5,6 +5,7 @@ System.paths = {
   'di/*': '/js/di/lib/*.js',
   'rtts_assert/*': '/js/rtts_assert/lib/*.js',
   'test_lib/*': '/js/test_lib/lib/*.js',
-  'benchmarks/*': '/js/benchmarks/lib/*.js'
+  'benchmarks/*': '/js/benchmarks/lib/*.js',
+  'reflection/*': '/js/reflection/lib/*.js'
 };
 register(System);