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-x86/asm/segment_32.h b/libc/kernel/arch-x86/asm/segment_32.h
index 5d7d0f9..a9b18ec 100644
--- a/libc/kernel/arch-x86/asm/segment_32.h
+++ b/libc/kernel/arch-x86/asm/segment_32.h
@@ -59,12 +59,12 @@
 #define GDT_ENTRY_PNPBIOS_DS (GDT_ENTRY_PNPBIOS_BASE + 2)
 #define GDT_ENTRY_PNPBIOS_TS1 (GDT_ENTRY_PNPBIOS_BASE + 3)
 #define GDT_ENTRY_PNPBIOS_TS2 (GDT_ENTRY_PNPBIOS_BASE + 4)
-#define PNP_CS32 (GDT_ENTRY_PNPBIOS_CS32 * 8)  
+#define PNP_CS32 (GDT_ENTRY_PNPBIOS_CS32 * 8)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define PNP_CS16 (GDT_ENTRY_PNPBIOS_CS16 * 8)  
-#define PNP_DS (GDT_ENTRY_PNPBIOS_DS * 8)  
-#define PNP_TS1 (GDT_ENTRY_PNPBIOS_TS1 * 8)  
-#define PNP_TS2 (GDT_ENTRY_PNPBIOS_TS2 * 8)  
+#define PNP_CS16 (GDT_ENTRY_PNPBIOS_CS16 * 8)
+#define PNP_DS (GDT_ENTRY_PNPBIOS_DS * 8)
+#define PNP_TS1 (GDT_ENTRY_PNPBIOS_TS1 * 8)
+#define PNP_TS2 (GDT_ENTRY_PNPBIOS_TS2 * 8)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IDT_ENTRIES 256
 #define SEGMENT_RPL_MASK 0x3