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/tegra_avp.h b/libc/kernel/common/linux/tegra_avp.h
index f3f39b9..dba7f6b 100644
--- a/libc/kernel/common/linux/tegra_avp.h
+++ b/libc/kernel/common/linux/tegra_avp.h
@@ -22,7 +22,7 @@
 #include <linux/types.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define TEGRA_AVP_LIB_MAX_NAME 32
-#define TEGRA_AVP_LIB_MAX_ARGS 220  
+#define TEGRA_AVP_LIB_MAX_ARGS 220
 struct tegra_avp_lib {
  char name[TEGRA_AVP_LIB_MAX_NAME];
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */