Run the same leg tests on build bot as in presubmit.py.

dart/frog/scripts/buildbot_annotated_steps.py

Index: dart/frog/scripts/buildbot_annotated_steps.py
diff --git a/dart/frog/scripts/buildbot_annotated_steps.py b/dart/frog/scripts/buildbot_annotated_steps.py
index 0930e51a9a7ba5f4c0c1f7a2a9f37dfc2da5144e..3bb18f2b15fcb527a3590a44991a0b6a5b3d0ec2 100644
--- a/dart/frog/scripts/buildbot_annotated_steps.py
+++ b/dart/frog/scripts/buildbot_annotated_steps.py
@@ -87,13 +87,14 @@ def TestFrog(arch, mode):
       env=NO_COLOR_ENV) != 0:
     return 1
 
+  frog_tests = ['language', 'corelib', 'isolate', 'frog',
+                'leg', 'leg_only', 'peg', 'await']
+
   if arch != 'frogium': # frog and frogsh
-    if TestStep("frog", testpy_mode, arch,
-        ['language', 'corelib', 'isolate', 'frog', 'leg', 'peg', 'await'],
-        flags) != 0:
+    if TestStep("frog", testpy_mode, arch, frog_tests, flags) != 0:
       return 1
 
-    if TestStep("leg only", testpy_mode, 'leg', ['leg_only'], flags) != 0:
+    if TestStep("leg", testpy_mode, 'leg', frog_tests, flags) != 0:
       return 1
   else:
     if (TestStep("browser", testpy_mode, 'frogium',