PNaCl: Allow translator to produce an unsandboxed, native executable

SConstruct

Index: SConstruct
diff --git a/SConstruct b/SConstruct
index f281ff3bc876277eaaf56ceea835558a0f55f407..b439118c90b8ce2d107808c4c31aee8ac80b0716 100755
--- a/SConstruct
+++ b/SConstruct
@@ -307,6 +307,9 @@ def SetUpArgumentBits(env):
   BitFromArgument(env, 'translate_in_build_step', default=True,
     desc='Run translation during build phase (e.g. if do_not_run_tests=1)')
 
+  BitFromArgument(env, 'pnacl_unsandboxed', default=False,
+    desc='Translate pexe to an unsandboxed, host executable')
+
   BitFromArgument(env, 'browser_headless', default=False,
     desc='Where possible, set up a dummy display to run the browser on '
       'when running browser tests.  On Linux, this runs the browser through '
@@ -1515,6 +1518,10 @@ def CommandSelLdrTestNacl(env, name, nexe,
   if args is not None:
     command += args
 
+  if env.Bit('pnacl_unsandboxed'):
+    # Run unsandboxed executable directly, without sel_ldr.
+    return env.CommandTest(name, command, size, **extra)
+
   if loader is None:
     loader = env.GetSelLdr()
     if loader is None: