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/common/linux/nfsd/export.h b/libc/kernel/common/linux/nfsd/export.h
index 7bb5774..bc71b82 100644
--- a/libc/kernel/common/linux/nfsd/export.h
+++ b/libc/kernel/common/linux/nfsd/export.h
@@ -33,12 +33,12 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFSEXP_NOHIDE 0x0200
 #define NFSEXP_NOSUBTREECHECK 0x0400
-#define NFSEXP_NOAUTHNLM 0x0800  
-#define NFSEXP_MSNFS 0x1000  
+#define NFSEXP_NOAUTHNLM 0x0800
+#define NFSEXP_MSNFS 0x1000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFSEXP_FSID 0x2000
 #define NFSEXP_CROSSMOUNT 0x4000
-#define NFSEXP_NOACL 0x8000  
+#define NFSEXP_NOACL 0x8000
 #define NFSEXP_ALLFLAGS 0xFE3F
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif