Merge pull request swiftlang#85 from graydon/cperf-fixes-oct-3

Revert "[run_cperf] Try turning off sandbox (hunting nondeterminism b…

Author: graydon

run_cperf

@@ -270,9 +270,8 @@ def execute_runner(instance, workspace, configs, args):
             '--swift-branch', args.swift_branch,
             '--add-swift-flags', flags,
         ]
-        # DEBUG: temporarily disable the sandbox feature here
-        # if args.sandbox:
-        #     runner_command += get_sandbox_profile_flags()
+        if args.sandbox:
+            runner_command += get_sandbox_profile_flags()
         if args.verbose:
             runner_command += ["--verbose"]
         common.check_execute(runner_command, timeout=9999999)