fix hello-world init

raven_spn/src/spn_data/data_array.py

@@ -35,7 +35,8 @@ ref_sample_cnt = len(ref_data.split(","))
 # create cpp file
 f = open("../xspn_data.cpp", "w")
 cpp_file = "#include <array>\n"
-cpp_file += "#include <cmath>\n\n"
+cpp_file += "#include <cmath>\n"
+cpp_file += "#include <bits/stdint-uintn.h>\n\n"
 # The results in the outputdata.txt file are not directly what comes out of the PE but the natural logarithm of it.
 cpp_file += "constexpr auto ln2 = std::log(2);\n"
 cpp_file += "std::array<uint8_t, " + str(input_sample_cnt) + "> input_data = {\n" + str(in_data) + "}; \n\n"