Clean up trailing whitespace in the kernel headers.

And fix the scripts so they stop letting trailing whitespace through.

Change-Id: Ie109fbe1f63321e565ba0fa60fee8e9cf3a61cfc
diff --git a/libc/kernel/common/linux/fadvise.h b/libc/kernel/common/linux/fadvise.h
index efa9e55..3cfa598 100644
--- a/libc/kernel/common/linux/fadvise.h
+++ b/libc/kernel/common/linux/fadvise.h
@@ -18,18 +18,18 @@
  ****************************************************************************/
 #ifndef FADVISE_H_INCLUDED
 #define FADVISE_H_INCLUDED
-#define POSIX_FADV_NORMAL 0  
-#define POSIX_FADV_RANDOM 1  
+#define POSIX_FADV_NORMAL 0
+#define POSIX_FADV_RANDOM 1
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define POSIX_FADV_SEQUENTIAL 2  
-#define POSIX_FADV_WILLNEED 3  
+#define POSIX_FADV_SEQUENTIAL 2
+#define POSIX_FADV_WILLNEED 3
 #ifdef __s390x__
-#define POSIX_FADV_DONTNEED 6  
+#define POSIX_FADV_DONTNEED 6
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define POSIX_FADV_NOREUSE 7  
+#define POSIX_FADV_NOREUSE 7
 #else
-#define POSIX_FADV_DONTNEED 4  
-#define POSIX_FADV_NOREUSE 5  
+#define POSIX_FADV_DONTNEED 4
+#define POSIX_FADV_NOREUSE 5
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #endif