Strip the resulting SimpleITK library for python.

This can result in a savings for nearly 100Mb for the size of the
shared library.

Author: blowekamp

CMakeLists.txt

@@ -223,6 +223,7 @@ if(SimpleITKPythonPackage_SUPERBUILD)
       -DSimpleITK_PYTHON_THREADS:BOOL=${SimpleITK_PYTHON_THREADS}
       -DSimpleITK_DIR:PATH=${SimpleITK_DIR}
       -DSWIG_EXECUTABLE:PATH=${SWIG_EXECUTABLE}
+      -DSimpleITK_BUILD_STRIP:BOOL=ON
       -DSKBUILD:BOOL=ON
     USES_TERMINAL_CONFIGURE 1
     USES_TERMINAL_BUILD 1