Update git submodules

* Update external/trusty/musl from branch 'master'
  to d64f459708dba5f0f176b8a2a987f8bfd6a1aa0f
  - Remove a dead syscall.h include in time.c
    
    Bug: 141189390
    Change-Id: I9224c98c79eee9ff5d6e437a66606a742053c747
    
1 file changed