Update git submodules

* Update external/boringssl from branch 'master'
  to eba0b62d87ad9440658c42d08753f809bc41723e
  - Merge "Mark libssl as recovery_available for update_engine_sideload"
  - Mark libssl as recovery_available for update_engine_sideload
    
    Test: build update_engine_sideload
    Change-Id: Id7d56719db13fbdab029092a84cec78c526b1a53
    

* Update external/googletest from branch 'master'
  to 29461112ba261539c7342c8481e5037c55079479
  - Merge "Mark libgtest_prod as recovery_available for update_engine_sideload"
  - Mark libgtest_prod as recovery_available for update_engine_sideload
    
    Test: build update_engine_sideload
    Change-Id: I2312e42ff06d6359e2ef5696b98b804101a1794f
    
2 files changed