Add a setup.py to the array_api submodule

Original NumPy Commit: d74a7d0b3297e10194bd3899a0d17a63610e49a1

Author: asmeurer

array_api_strict/setup.py

@@ -0,0 +1,10 @@
+def configuration(parent_package='', top_path=None):
+    from numpy.distutils.misc_util import Configuration
+    config = Configuration('array_api', parent_package, top_path)
+    config.add_subpackage('tests')
+    return config
+
+
+if __name__ == '__main__':
+    from numpy.distutils.core import setup
+    setup(configuration=configuration)