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/wait.h b/libc/kernel/common/linux/wait.h
index 7eb2124..f4688c7 100644
--- a/libc/kernel/common/linux/wait.h
+++ b/libc/kernel/common/linux/wait.h
@@ -24,11 +24,11 @@
 #define WSTOPPED WUNTRACED
 #define WEXITED 0x00000004
 #define WCONTINUED 0x00000008
-#define WNOWAIT 0x01000000  
+#define WNOWAIT 0x01000000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define __WNOTHREAD 0x20000000  
-#define __WALL 0x40000000  
-#define __WCLONE 0x80000000  
+#define __WNOTHREAD 0x20000000
+#define __WALL 0x40000000
+#define __WCLONE 0x80000000
 #define P_ALL 0
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define P_PID 1