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/ptrace.h b/libc/kernel/arch-mips/asm/ptrace.h
index 43cfcf1..d971c7e 100644
--- a/libc/kernel/arch-mips/asm/ptrace.h
+++ b/libc/kernel/arch-mips/asm/ptrace.h
@@ -28,7 +28,7 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FPC_CSR 69
 #define FPC_EIR 70
-#define DSP_BASE 71  
+#define DSP_BASE 71
 #define DSP_CONTROL 77
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ACX 78