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-mips/asm/termios.h b/libc/kernel/arch-mips/asm/termios.h
index d6f230e..e17acd8 100644
--- a/libc/kernel/arch-mips/asm/termios.h
+++ b/libc/kernel/arch-mips/asm/termios.h
@@ -68,20 +68,20 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned char c_cc[NCCS];
 };
-#define TIOCM_LE 0x001  
-#define TIOCM_DTR 0x002  
+#define TIOCM_LE 0x001
+#define TIOCM_DTR 0x002
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define TIOCM_RTS 0x004  
-#define TIOCM_ST 0x010  
-#define TIOCM_SR 0x020  
-#define TIOCM_CTS 0x040  
+#define TIOCM_RTS 0x004
+#define TIOCM_ST 0x010
+#define TIOCM_SR 0x020
+#define TIOCM_CTS 0x040
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define TIOCM_CAR 0x100  
+#define TIOCM_CAR 0x100
 #define TIOCM_CD TIOCM_CAR
-#define TIOCM_RNG 0x200  
+#define TIOCM_RNG 0x200
 #define TIOCM_RI TIOCM_RNG
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define TIOCM_DSR 0x400  
+#define TIOCM_DSR 0x400
 #define TIOCM_OUT1 0x2000
 #define TIOCM_OUT2 0x4000
 #define TIOCM_LOOP 0x8000