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/sgiarcs.h b/libc/kernel/arch-mips/asm/sgiarcs.h
index 5fe0d47..b9fff3f 100644
--- a/libc/kernel/arch-mips/asm/sgiarcs.h
+++ b/libc/kernel/arch-mips/asm/sgiarcs.h
@@ -291,13 +291,13 @@
 #define SGIPROM_STDIN 0
 #define SGIPROM_STDOUT 1
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define SGIPROM_ROFILE 0x01  
-#define SGIPROM_HFILE 0x02  
-#define SGIPROM_SFILE 0x04  
-#define SGIPROM_AFILE 0x08  
+#define SGIPROM_ROFILE 0x01
+#define SGIPROM_HFILE 0x02
+#define SGIPROM_SFILE 0x04
+#define SGIPROM_AFILE 0x08
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define SGIPROM_DFILE 0x10  
-#define SGIPROM_DELFILE 0x20  
+#define SGIPROM_DFILE 0x10
+#define SGIPROM_DELFILE 0x20
 struct sgi_partition {
  unsigned char flag;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */