Soundtouch update from 1.5 to 1.71 as per patch from lincolnh_br.
There's been changes in the VS2008 project file which we may want to look at and port to 2010/2012 separately but it builds like this in 2010 here.
I want to wait and see if there's any issues with Linux first, too.
Thanks to lincolnh_br :)

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5619 96395faa-99c1-11dd-bbfe-3dabce05a288