Update for python3.

This fixes all of the problems with our kernel scripts, but not
the clang python script problems.

I also removed the updateGitFiles function since that code was
just silently failing any way. I replaced all calls with updateFiles.

Test: Ran script using python2 to verify it still works.
Test: Run script in python3 verifying that it starts to run.

Change-Id: I223a31a8324c59e6bc4067f48a6110361b3e26e8
diff --git a/libc/kernel/tools/clean_header.py b/libc/kernel/tools/clean_header.py
index f86d36e..cfd301a 100755
--- a/libc/kernel/tools/clean_header.py
+++ b/libc/kernel/tools/clean_header.py
@@ -127,7 +127,7 @@
 if __name__ == "__main__":
 
     def usage():
-        print """\
+        print("""\
     usage:  %s [options] <header_path>
 
         options:
@@ -142,7 +142,7 @@
             -d<path>  specify path of cleaned kernel headers
 
         <header_path> must be in a subdirectory of 'original'
-    """ % os.path.basename(sys.argv[0])
+    """ % os.path.basename(sys.argv[0]))
         sys.exit(1)
 
     try:
@@ -211,9 +211,8 @@
         else:
             r = "added"
 
-        print "cleaning: %-*s -> %-*s (%s)" % (35, path, 35, path, r)
+        print("cleaning: %-*s -> %-*s (%s)" % (35, path, 35, path, r))
 
-
-    b.updateGitFiles()
+    b.updateFiles()
 
     sys.exit(0)