Fix test adding support for scikit-build >= 0.9.0

scikit-build >= 0.9.0 converted skbuild.constants into functions to
support custom platform name.
See scikit-build/scikit-build@cb324b8

Author: jcfr

cmake/__init__.py

@@ -14,7 +14,7 @@
 if not os.path.exists(CMAKE_DATA):
     from skbuild.constants import CMAKE_INSTALL_DIR as SKBUILD_CMAKE_INSTALL_DIR
     _cmake_data = os.path.abspath(os.path.join(
-        os.path.dirname(__file__), '..', SKBUILD_CMAKE_INSTALL_DIR, 'cmake/data'))
+        os.path.dirname(__file__), '..', SKBUILD_CMAKE_INSTALL_DIR(), 'cmake/data'))
     if os.path.exists(_cmake_data):
         CMAKE_DATA = _cmake_data