Update git submodules

* Update external/freetype from branch 'master'
  to b6fc4c6f3f84bc55b03b5d5b3f19f7eb12460288
  - Merge "Update cpe for vulnerability scanners"
  - Update cpe for vulnerability scanners
    
    Bug: http://b/201572953
    Change-Id: I2c6585b879d7582f564c5c843328bc57b5aeef36
    
1 file changed