USN-5672-2: GMP vulnerability

USN-5672-2: GMP vulnerability

USN-5672-1 fixed a vulnerability in GMP. This update provides
the corresponsing update for Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that GMP did not properly manage memory
on 32-bit platforms when processing a specially crafted
input. An attacker could possibly use this issue to cause
applications using GMP to crash, resulting in a denial of
service.
Source: USN-5672-2: GMP vulnerability