Squish update

This will update Squish version to 5.1.0. 64-bit MSVC2011 x64 and
MSVC2010 will not be updated because no 5.1.0 packages available
at the moment.

Change-Id: Id0bfdd1d49ce895bc992aecd7091406a715349a1
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>