run embedding test with current Python, not system Python

runtests.py

@@ -619,17 +619,20 @@ class EmbedTest(unittest.TestCase):
     def setUp(self):
         self.old_dir = os.getcwd()
         os.chdir(self.working_dir)
-        os.system("make clean > /dev/null")
+        os.system(
+            "make PYTHON='%s' clean > /dev/null" % sys.executable)
     
     def tearDown(self):
         try:
-            os.system("make clean > /dev/null")
+            os.system(
+                "make PYTHON='%s' clean > /dev/null" % sys.executable)
         except:
             pass
         os.chdir(self.old_dir)
         
     def test_embed(self):
-        self.assert_(os.system("make test > make.output") == 0)
+        self.assert_(os.system(
+            "make PYTHON='%s' test > make.output" % sys.executable) == 0)
 
 class MissingDependencyExcluder:
     def __init__(self, deps):