Always open dev tools before benchmarks are run

Otherwise profiles aren't generated.

benchmark/benchmark-bootstrap.coffee

@@ -1,6 +1,8 @@
 require 'atom'
 {runSpecSuite} = require 'jasmine-helper'
 
+atom.openDevTools()
+
 document.title = "Benchmark Suite"
 benchmarkSuite = require.resolve('./benchmark-suite')
 runSpecSuite(benchmarkSuite, true)