Update git submodules

* Update external/lk from branch 'master'
  to cc4f65b1168fd509957b31d6643db6d26b2195d8
  - [vm] Fix ubsan overflows
    
    Bug: 129300035
    Change-Id: I6c67ea047b610b497ad2856dd432873b880c234b
    

* Update trusty/kernel from branch 'master'
  to f0861f960c82da734c91a3404b9355f551a9af8b
  - [lib][sm] Fix UBSAN error
    
    SM_ERR_UNDEFINED_SMC is returned in a long tiggering an overflow on 32
    bit kernels.
    
    Bug: 129300035
    Change-Id: Ia65cb8e8890c9cb5173aaff9b72a8fc23c69aaeb
    
  - [app][mmutest] Add an allocation test to trigger UBSAN checks
    
    Add some allocation around the last address in the kernel aspace to
    trigger overflows in the vmm and arch mmu code.
    
    Bug: 129300035
    Change-Id: I2abb9beac85eb3a00dae9ff3d7dc5766aac9f94b
    
  - [lib][trusty][ipc] UBSAN fixes
    
    Bug: 129300035
    Change-Id: I0e02950df83e486e30be5516340ef584070fa558
    
diff --git a/external/lk b/external/lk
index f17a5e6..cc4f65b 160000
--- a/external/lk
+++ b/external/lk
@@ -1 +1 @@
-Subproject commit f17a5e6706c45cfee109a6efa5ae161918804706
+Subproject commit cc4f65b1168fd509957b31d6643db6d26b2195d8
diff --git a/trusty/kernel b/trusty/kernel
index b76cff7..f0861f9 160000
--- a/trusty/kernel
+++ b/trusty/kernel
@@ -1 +1 @@
-Subproject commit b76cff71f70b95f0bb264123353670b574e962a0
+Subproject commit f0861f960c82da734c91a3404b9355f551a9af8b