legal: CA bundle and Intel Bluetooth firmware notices

- THIRD-PARTY-NOTICES.txt gains sections for the Mozilla CA certificate
  bundle (0:/os/certs/ca-certificates.crt; Mozilla CA Certificate
  Program root store as packaged by Debian/Ubuntu ca-certificates,
  MPL-2.0) and the Intel Bluetooth firmware blobs
  (0:/os/firmware/intel/ibt-1040-0041.*, from linux-firmware, Intel
  redistributable firmware license).
- MPL-2.0 full text and Intel's firmware license (with its required
  copyright notice and disclaimer) ship at 0:/os/licenses/.
- Both added to the license's third-party list and man legal.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

programs/man/legal.7

@@ -49,5 +49,9 @@
     * Tiny C Compiler (tcc.elf, 0:/lib/tcc), Copyright (c) Fabrice Bellard and
       contributors - LGPL-2.1
     * Lua (lua.elf, 0:/lib/lua), Copyright (C) Lua.org, PUC-Rio - MIT
+    * Mozilla CA certificate bundle (0:/os/certs), Mozilla CA Certificate
+      Program - MPL-2.0
+    * Intel Bluetooth firmware (0:/os/firmware/intel), Copyright (c) Intel
+      Corporation - Intel redistributable firmware license
 
     Full license texts and notices are on this system in 0:/os/licenses/.