Add helper script to sign Rust binaries for Instruments.app

Also see rust-lang/rust#107033

bin/codesign-for-instruments

@@ -0,0 +1,14 @@
+#!/usr/bin/env zsh
+# Re-sign a (Rust) binary to allow debuggers like Instruments to attach to it.
+# Source: https://cocoaphony.micro.blog/2022/10/29/solving-required-kernel.html
+
+BIN=$1
+
+exec codesign -s - -v -f --entitlements =(echo -n '<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "https://www.apple.com/DTDs/PropertyList-1.0.dtd"\>
+<plist version="1.0">
+    <dict>
+        <key>com.apple.security.get-task-allow</key>
+        <true/>
+    </dict>
+</plist>') "$BIN"