Add build/GAMEID/report.json rule using objdiff-cli

tools/download_tool.py

@@ -55,6 +55,21 @@ def dtk_url(tag: str) -> str:
     repo = "https://github.com/encounter/decomp-toolkit"
     return f"{repo}/releases/download/{tag}/dtk-{system}-{arch}{suffix}"
 
+def objdiff_cli_url(tag: str) -> str:
+    uname = platform.uname()
+    suffix = ""
+    system = uname.system.lower()
+    if system == "darwin":
+        system = "macos"
+    elif system == "windows":
+        suffix = ".exe"
+    arch = uname.machine.lower()
+    if arch == "amd64":
+        arch = "x86_64"
+
+    repo = "https://github.com/encounter/objdiff"
+    return f"{repo}/releases/download/{tag}/objdiff-cli-{system}-{arch}{suffix}"
+
 
 def sjiswrap_url(tag: str) -> str:
     repo = "https://github.com/encounter/sjiswrap"
@@ -70,6 +85,7 @@ TOOLS: Dict[str, Callable[[str], str]] = {
     "binutils": binutils_url,
     "compilers": compilers_url,
     "dtk": dtk_url,
+    "objdiff-cli": objdiff_cli_url,
     "sjiswrap": sjiswrap_url,
     "wibo": wibo_url,
 }