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/vr41xx/irq.h b/libc/kernel/arch-mips/asm/vr41xx/irq.h
index 1c54b66..ecc74fc 100644
--- a/libc/kernel/arch-mips/asm/vr41xx/irq.h
+++ b/libc/kernel/arch-mips/asm/vr41xx/irq.h
@@ -59,7 +59,7 @@
 #define HSP_IRQ SYSINT2_IRQ(2)
 #define TCLOCK_IRQ SYSINT2_IRQ(3)
 #define FIR_IRQ SYSINT2_IRQ(4)
-#define CEU_IRQ SYSINT2_IRQ(4)  
+#define CEU_IRQ SYSINT2_IRQ(4)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define DSIU_IRQ SYSINT2_IRQ(5)
 #define PCI_IRQ SYSINT2_IRQ(6)
@@ -71,7 +71,7 @@
 #define SYSINT2_IRQ_LAST ETHERNET_IRQ
 #define GIU_IRQ_BASE 40
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define GIU_IRQ(x) (GIU_IRQ_BASE + (x))  
+#define GIU_IRQ(x) (GIU_IRQ_BASE + (x))
 #define GIU_IRQ_LAST GIU_IRQ(31)
 #define VRC4173_IRQ_BASE 72
 #define VRC4173_IRQ(x) (VRC4173_IRQ_BASE + (x))