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/termbits.h b/libc/kernel/arch-x86/asm/termbits.h
index 0d03ddd..fce7bac 100644
--- a/libc/kernel/arch-x86/asm/termbits.h
+++ b/libc/kernel/arch-x86/asm/termbits.h
@@ -139,7 +139,7 @@
 #define FF0 0000000
 #define FF1 0100000
 #define CBAUD 0010017
-#define B0 0000000  
+#define B0 0000000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define B50 0000001
 #define B75 0000002
@@ -177,7 +177,7 @@
 #define CLOCAL 0004000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CBAUDEX 0010000
-#define BOTHER 0010000  
+#define BOTHER 0010000
 #define B57600 0010001
 #define B115200 0010002
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
@@ -197,11 +197,11 @@
 #define B3500000 0010016
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define B4000000 0010017
-#define CIBAUD 002003600000  
-#define CMSPAR 010000000000  
-#define CRTSCTS 020000000000  
+#define CIBAUD 002003600000
+#define CMSPAR 010000000000
+#define CRTSCTS 020000000000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define IBSHIFT 16  
+#define IBSHIFT 16
 #define ISIG 0000001
 #define ICANON 0000002
 #define XCASE 0000004