USN-5761-2: ca-certificates update

USN-5761-2: ca-certificates update

USN-5761-1 updated ca-certificates. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Due to security concerns, the TrustCor certificate authority has been
marked as distrusted in Mozilla’s root store. This update removes the
TrustCor CA certificates from the ca-certificates package.
Source: USN-5761-2: ca-certificates update