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/termbits.h b/libc/kernel/arch-arm/asm/termbits.h
index 4aa14d9..476432b 100644
--- a/libc/kernel/arch-arm/asm/termbits.h
+++ b/libc/kernel/arch-arm/asm/termbits.h
@@ -113,7 +113,7 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FF1 0100000
 #define CBAUD 0010017
-#define B0 0000000  
+#define B0 0000000
 #define B50 0000001
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define B75 0000002
@@ -169,10 +169,10 @@
 #define B3000000 0010015
 #define B3500000 0010016
 #define B4000000 0010017
-#define CIBAUD 002003600000  
+#define CIBAUD 002003600000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define CMSPAR 010000000000  
-#define CRTSCTS 020000000000  
+#define CMSPAR 010000000000
+#define CRTSCTS 020000000000
 #define ISIG 0000001
 #define ICANON 0000002
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */