Update SimpleITK version along master branch with MSVC fixes

This update to the SimpleITK version include fixes for compilation on
MSVC related to the bigobj flag and striping failing with Ninja.

Author: blowekamp

CMakeLists.txt

@@ -57,7 +57,7 @@ if(SimpleITKPythonPackage_SUPERBUILD)
   include(ExternalProject)
 
   set(SimpleITK_REPOSITORY https://itk.org/SimpleITK.git)
-  set(SimpleITK_GIT_TAG "4f2fe5a0fc6d99f7e63bdd9eb04e1b8344c9b1f1") #1.0.0.dev19
+  set(SimpleITK_GIT_TAG "8b79ac1230576b1efba2a642e0fe714009c46ec4") #1.0.0.dev66
 
   # Add an empty external project
   function(sitk_ExternalProject_Add_Empty proj depends)