force_test_exit(): This has been completely ineffective

at stopping test_signal from hanging forever on the Tru64
buildbot.  That could be because there's no such thing as
signal.SIGALARM.  Changed to the idiotic (but standard)
signal.SIGALRM instead, and added some more debug output.

Lib/test/test_signal.py

@@ -10,7 +10,10 @@ if verbose:
     x = '-x'
 else:
     x = '+x'
+
 pid = os.getpid()
+if verbose:
+    print "test runner's pid is", pid
 
 # Shell script that will send us asynchronous signals
 script = """
@@ -89,7 +92,8 @@ def force_test_exit():
             time.sleep(MAX_DURATION + 5)
             print >> sys.__stdout__, '  child should not have to kill parent'
             for i in range(3):
-                os.kill(pid, signal.SIGALARM)
+                os.kill(pid, signal.SIGALRM)
+                print >> sys.__stdout__, "    child sent SIGALRM to", pid
         finally:
             os._exit(0)
     # In parent (or error)