Update git submodules

* Update external/lk from branch 'master'
  to bd61ec518c155bc071a276c3ca8b78a4f8993a71
  - [arch][arm/arm64] Call trusty_app_crash for user-space crashes
    
    Call trusty_app_crash when a crash happens in user-space. If the app is
    allowed to crash, trusty_app_crash will exit the app instead of returning.
    
    Bug: 147698516
    Change-Id: Ibe568eda8b1aa5a36b8fe3608cb75997907bceed
    

* Update trusty/kernel from branch 'master'
  to 57b689b008ec947c6ae9f9c222224aee0a87db40
  - [lib][trusty] Add trusty_app_crash
    
    Called by user space fault handler to crash a trusty app. This will
    currently panic, but can be used to exit the app instead in the future.
    
    Bug: 147698516
    Change-Id: Id858e7af25cd8139b67c9d21892ba66ea28fe938
    
2 files changed