[Windows] Fix build on 32 bit hosts and update src/3rdparty.

The default Windows SDK path is different on 32 bit machines. Adjust it
to look for the D3D dlls in the right location.

Co-Authored with Kai Koehne.

Also updates 3rdparty submodule to enable builds with MSVS2015 and
let the merge from 5.6 to dev pass the CI.

Change-Id: Ifb31a0e379c978b238b3437170c53a02cbde0349
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

1 files changed, 0 insertions, 0 deletions

diff --git a/src/3rdparty b/src/3rdparty
-Subproject 86dd74289879a40dce737459dda22e97036f775
+Subproject bb55175ddb321fcfa440c215b7abe2cb19fe0ee