Update git submodules

* Update external/lk from branch 'master'
  to ce8beec454ad3b9e94d195f0dbb6967f683c04a4
  - [arch] add arch-specific function for setting userspace TLS register.
    
    The registers were chosen to match Linux. Clang has hard-coded
    expectations for the register names.
    
    Bug: 110161494
    Change-Id: I1e5d50f9cb60ee8942e7ee5b8ca2591215604597
    

* Update trusty/kernel from branch 'master'
  to 4c45a48cd9864bd4a1380edf6e7ebd28370aa1f7
  - [lib][trusty] add set_user_tls syscall.
    
    Bug: 110161494
    Change-Id: I8798e7156d432cc2d831815136f302e789e969ba
    
2 files changed