Keep the kernel header scrubber's data structures in sync.

If you rewrite the tokens of a #if you need to rewrite the expression to match
because either might be used later. This was showing up as SIGRTMAX being
rewritten in a #define but not in the #ifndef that guarded it, for which case
I've added a unit test.

Change-Id: I6929675461a1afe272edd667594529fd84a3dc4d

libc/kernel/tools/clean_header.py

@@ -7,7 +7,7 @@ from utils import *
 
 noUpdate = 1
 
-def  cleanupFile( path, original_path):
+def cleanupFile(path, original_path):
     """reads an original header and perform the cleanup operation on it
        this functions returns the destination path and the clean header
        as a single string"""