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/ptrace.h b/libc/kernel/arch-arm/asm/ptrace.h
index 661ba97..ab58990 100644
--- a/libc/kernel/arch-arm/asm/ptrace.h
+++ b/libc/kernel/arch-arm/asm/ptrace.h
@@ -63,11 +63,11 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PSR_N_BIT 0x80000000
 #define PCMASK 0
-#define PSR_f 0xff000000  
-#define PSR_s 0x00ff0000  
+#define PSR_f 0xff000000
+#define PSR_s 0x00ff0000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define PSR_x 0x0000ff00  
-#define PSR_c 0x000000ff  
+#define PSR_x 0x0000ff00
+#define PSR_c 0x000000ff
 #ifndef __ASSEMBLY__
 struct pt_regs {
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */