Fix stdlib typos that would cause NameError or AttributeError exceptions

mitogen/profiler.py

@@ -90,7 +90,7 @@ def merge_stats(outpath, inpaths):
                     break
                 time.sleep(0.2)
 
-    stats.dump_stats(outpath)
+    pstats.dump_stats(outpath)
 
 
 def generate_stats(outpath, tmpdir):

tests/testlib.py

@@ -144,7 +144,7 @@ def wait_for_port(
 
         if not pattern:
             # Success: We connected & there's no banner check to perform.
-            sock.shutdown(socket.SHUTD_RDWR)
+            sock.shutdown(socket.SHUT_RDWR)
             sock.close()
             return