Make blink_trybot recipe work on windows

scripts/common/unittests/annotator_test.py

Index: scripts/common/unittests/annotator_test.py
diff --git a/scripts/common/unittests/annotator_test.py b/scripts/common/unittests/annotator_test.py
index a4be61da047a220bbc887a6702fe00758414e08d..7fa61cde4888245feb31fb67783e28aa0bdbb075 100755
--- a/scripts/common/unittests/annotator_test.py
+++ b/scripts/common/unittests/annotator_test.py
@@ -284,11 +284,11 @@ class TestExecution(unittest.TestCase):
         '@@@STEP_CURSOR one@@@',
         '',
         '@@@STEP_STARTED@@@',
-        "/usr/bin/python -c print 'hello!'",
+        sys.executable + " -c print 'hello!'",
         '  allow_subannotations: False',
         '  always_run: False',
         '  build_failure: False',
-        '  cmd: [\'/usr/bin/python\', \'-c\', "print \'hello!\'"]',
+        '  cmd: [' + repr(sys.executable) + ', \'-c\', "print \'hello!\'"]',
         '  cwd: None',
         '  env: None',
         '  followup_fn: None',
@@ -305,11 +305,11 @@ class TestExecution(unittest.TestCase):
         '@@@STEP_CURSOR two@@@',
         '',
         '@@@STEP_STARTED@@@',
-        "/usr/bin/python -c print 'yo!'",
+        sys.executable + " -c print 'yo!'",
         '  allow_subannotations: False',
         '  always_run: False',
         '  build_failure: False',
-        '  cmd: [\'/usr/bin/python\', \'-c\', "print \'yo!\'"]',
+        '  cmd: [' + repr(sys.executable) + ', \'-c\', "print \'yo!\'"]',
         '  cwd: None',
         '  env: None',
         '  followup_fn: None',