Update git submodules

* Update external/lk from branch 'master'
  to 03e5d328f7e04e66eedddb5d5eb38317918ea7cc
  - [arch][arm64][mmu] Validate paddr
    
    The top bits in the pte are used for attributes. If the address passed
    in is too large a truncated address would be mapped with extra attribute
    bits set.
    
    Bug: 140628678
    Change-Id: I71939bd8d49fe85df1ae2bf93e1f437d2f134c4e
    
1 file changed