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/mtd/cfi.h b/libc/kernel/common/linux/mtd/cfi.h
index 944bbfa..20952ca 100644
--- a/libc/kernel/common/linux/mtd/cfi.h
+++ b/libc/kernel/common/linux/mtd/cfi.h
@@ -232,7 +232,7 @@
 #define CFI_MFR_AMD 0x0001
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CFI_MFR_ATMEL 0x001F
-#define CFI_MFR_ST 0x0020  
+#define CFI_MFR_ST 0x0020
 typedef int (*varsize_frob_t)(struct map_info *map, struct flchip *chip,
  unsigned long adr, int len, void *thunk);
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */