Find ABI-compatible versions of MinGW only

[Rafael Espíndola]

On 12 December 2013 12:35, Yaron Keren <yaron.keren at gmail.com> wrote:
> With the new update to the ABI, we should not look for installations of
> MinGW older than 4.7 with incompatible C++ libraries.
>
> This patch make clang search for the latest versions of the 4.7 and 4.8 gcc
> branches : 4.7.3 and 4.8.1.

Why remove 4.7.0?

LGTM with that.

Cheers,
Rafael