Forgot to add the resnet18 demo driver

src/onnx/resnet18.cpp

+#include <cstdio>
+#include <string>
+#include <fstream>
+#include <numeric>
+#include <stdexcept>
+
+#include <migraph/onnx.hpp>
+
+#include <migraph/cpu/cpu_target.hpp>
+#include <migraph/generate.hpp>
+
+int main(int argc, char const* argv[])
+{
+    std::string file = argv[1];
+    auto prog        = migraph::parse_onnx(file);
+    prog.compile(migraph::cpu::cpu_target{});
+    auto s = migraph::shape{migraph::shape::float_type, {1, 3, 32, 32}};
+    auto input3 = migraph::generate_argument(s, 12345);
+    auto result = prog.eval({{"0", input3}});
+}
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