Move CA certificates update to system/ca-certificates

The CA certificates moved to an external project. This update was
reflected in the system/ca-certificates branch with commit
6f831a644d4a6f04ad1f2c8bc54c8daf17929b3a

Bug: 24992154
Change-Id: Ica6028b7e3128682515ca385e62fc3bdb9e19e04
8 files changed