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/arch-arm/asm/termios.h b/libc/kernel/arch-arm/asm/termios.h
index 4b80774..46351cf 100644
--- a/libc/kernel/arch-arm/asm/termios.h
+++ b/libc/kernel/arch-arm/asm/termios.h
@@ -64,17 +64,17 @@
 #define N_PPP 3
 #define N_STRIP 4
 #define N_AX25 5
-#define N_X25 6  
+#define N_X25 6
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define N_6PACK 7
-#define N_MASC 8  
-#define N_R3964 9  
-#define N_PROFIBUS_FDL 10  
+#define N_MASC 8
+#define N_R3964 9
+#define N_PROFIBUS_FDL 10
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define N_IRDA 11  
-#define N_SMSBLOCK 12  
-#define N_HDLC 13  
+#define N_IRDA 11
+#define N_SMSBLOCK 12
+#define N_HDLC 13
 #define N_SYNC_PPP 14
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define N_HCI 15  
+#define N_HCI 15
 #endif