Added API scanner tool

New tool for issue #171 which links to libxenia to dump the API usage
from packaged content

src/xenia/tools/api-scanner/api_scanner_main.cc

@@ -0,0 +1,47 @@
+/**
+ ******************************************************************************
+ * api-scanner - Scan for API imports from a packaged 360 game                *
+ ******************************************************************************
+ * Copyright 2015 x1nixmzeng. All rights reserved.                            *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <gflags/gflags.h>
+#include "api_scanner_loader.h"
+
+namespace xe {
+namespace tools {
+
+DEFINE_string(target, "", "List of file to extract imports from");
+
+int api_scanner_main(std::vector<std::wstring>& args) {
+
+  // XXX we need gflags to split multiple flags into arrays for us
+
+  if (args.size() == 2 || !FLAGS_target.empty()) {
+    apiscanner_loader loader_;
+    std::wstring target(FLAGS_target.empty() ? args[1] :
+      poly::to_wstring(FLAGS_target));
+
+    std::wstring target_abs = poly::to_absolute_path(target);
+
+    // XXX For each target?
+    if (loader_.LoadTitleImports(target)) {
+      for (const auto title : loader_.GetAllTitles()) {
+        printf("%08x\n", title.title_id);
+        for (const auto import : title.imports) {
+          printf("\t%s\n", import.c_str());
+        }
+      }
+    }
+  }
+
+  return 0;
+}
+
+}  // namespace tools
+}  // namespace xe
+
+DEFINE_ENTRY_POINT(L"api-scanner", L"api-scanner --target=<target file>",
+  xe::tools::api_scanner_main);