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/sibyte/bcm1480_scd.h b/libc/kernel/arch-mips/asm/sibyte/bcm1480_scd.h
index 250aca8..c70b282 100644
--- a/libc/kernel/arch-mips/asm/sibyte/bcm1480_scd.h
+++ b/libc/kernel/arch-mips/asm/sibyte/bcm1480_scd.h
@@ -104,7 +104,7 @@
 #define M_BCM1480_SCD_WDOG_RESET_TYPE _SB_MAKEMASK(5, S_BCM1480_SCD_WDOG_RESET_TYPE)
 #define V_BCM1480_SCD_WDOG_RESET_TYPE(x) _SB_MAKEVALUE(x, S_BCM1480_SCD_WDOG_RESET_TYPE)
 #define G_BCM1480_SCD_WDOG_RESET_TYPE(x) _SB_GETVALUE(x, S_BCM1480_SCD_WDOG_RESET_TYPE, M_BCM1480_SCD_WDOG_RESET_TYPE)
-#define K_BCM1480_SCD_WDOG_RESET_FULL 0  
+#define K_BCM1480_SCD_WDOG_RESET_FULL 0
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define K_BCM1480_SCD_WDOG_RESET_SOFT 1
 #define K_BCM1480_SCD_WDOG_RESET_CPU0 3