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
    
diff --git a/external/lk b/external/lk
index 7eb7bde..bd61ec5 160000
--- a/external/lk
+++ b/external/lk
@@ -1 +1 @@
-Subproject commit 7eb7bde338f7a4c95001f3df5b0f58b5edbd3bc4
+Subproject commit bd61ec518c155bc071a276c3ca8b78a4f8993a71
diff --git a/trusty/kernel b/trusty/kernel
index 328b9b5..57b689b 160000
--- a/trusty/kernel
+++ b/trusty/kernel
@@ -1 +1 @@
-Subproject commit 328b9b5bcbebe09b40eb76e7b081d6b2103de524
+Subproject commit 57b689b008ec947c6ae9f9c222224aee0a87db40