add Ubuntu 24.04 arm64

platforms.json

@@ -205,6 +205,25 @@
         "install_instructions": "debian_new"
       }
     },
+
+    "Ubuntu 24.04 arm64": {
+      "codename": "noble",
+      "docker": {
+        "directory": "linux_cross",
+        "image_basename": "ubuntu24.04_arm64",
+        "build_options": {
+          "image_from": "ubuntu:24.04",
+          "image_prepare_script": "install_apt.sh",
+          "arch": "arm64",
+          "toolchain": "g++-aarch64-linux-gnu",
+          "triplet": "aarch64-linux-gnu"
+        }
+      },
+      "ppa": {
+        "filters": ["ubuntu24.04"],
+        "install_instructions": "debian_new"
+      }
+    },
     
     "Ubuntu 24.10": {
       "codename": "oracular",