Regenerate the NOTICE files.

Also standardize the orthography in a few places to reduce near-duplicates
in the NOTICE files.

Change-Id: I347c75e817be61ec1b9c5b4b96226feedc8d09ab
diff --git a/libc/arch-aarch64/bionic/__rt_sigreturn.S b/libc/arch-aarch64/bionic/__rt_sigreturn.S
index be5d1fa..d176ea3 100644
--- a/libc/arch-aarch64/bionic/__rt_sigreturn.S
+++ b/libc/arch-aarch64/bionic/__rt_sigreturn.S
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2013 The Android Open Source Project
- * All rights reserved
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions