Add std::array container wrappers for Python

These work much like any of the other STL containers except Python slicing
is somewhat limited because the array is a fixed size. Only slices of
the full size are supported.

Examples/test-suite/common.mk

@@ -531,6 +531,7 @@ CPP11_TEST_CASES = \
 	cpp11_initializer_list \
 	cpp11_initializer_list_extend \
 	cpp11_lambda_functions \
+	cpp11_li_std_array \
 	cpp11_noexcept \
 	cpp11_null_pointer_constant \
 	cpp11_raw_string_literals \