Revert "Made test.py not mention the defunct --crankshaft flag."

tools/test.py

Index: tools/test.py
diff --git a/tools/test.py b/tools/test.py
index 3bc94b66163aae0367f8ba1f8da0808b56f2df14..676bd5753bd07e2a8bb97340035f272d4c2f3f48 100755
--- a/tools/test.py
+++ b/tools/test.py
@@ -1202,6 +1202,9 @@ def BuildOptions():
   result.add_option("--nostress",
                     help="Don't run crankshaft --always-opt --stress-op test",
                     default=False, action="store_true")
+  result.add_option("--crankshaft",
+                    help="Run with the --crankshaft flag",
+                    default=False, action="store_true")
   result.add_option("--shard-count",
                     help="Split testsuites into this number of shards",
                     default=1, type="int")
@@ -1242,6 +1245,13 @@ def ProcessOptions(options):
   global VARIANT_FLAGS
   if options.stress_only:
     VARIANT_FLAGS = [['--stress-opt', '--always-opt']]
+  if options.nostress:
+    VARIANT_FLAGS = [[],['--nocrankshaft']]
+  if options.crankshaft:
+    if options.special_command:
+      options.special_command += " --crankshaft"
+    else:
+      options.special_command = "@--crankshaft"
   if options.noprof:
     options.scons_flags.append("prof=off")
     options.scons_flags.append("profilingsupport=off")
@@ -1406,7 +1416,8 @@ def Main():
         'mode': mode,
         'system': utils.GuessOS(),
         'arch': options.arch,
-        'simulator': options.simulator
+        'simulator': options.simulator,
+        'crankshaft': options.crankshaft
       }
       test_list = root.ListTests([], path, context, mode, [])
       unclassified_tests += test_list