add permission for checkout file

package.json

@@ -35,7 +35,8 @@
     "add-remote-service": "./checkout remote-service",
     "add-messaging": "./checkout messaging",
     "add-all-xmpls": "npm run add-remote-service && npm run add-messaging && npm run add-change-tracking && npm run add-audit-log",
-    "reset": "read -p 'This will irreversibly reset your working directory including ALL files in this git repo. Continue?' -n 1 -r && echo && if [[ $REPLY =~ ^[Yy]$ ]]; then git clean -fd && git reset --hard && npm i; fi"
+    "reset": "read -p 'This will irreversibly reset your working directory including ALL files in this git repo. Continue?' -n 1 -r && echo && if [[ $REPLY =~ ^[Yy]$ ]]; then git clean -fd && git reset --hard && npm i; fi",
+    "make-exec": "chmod +x ./checkout"
   },
   "jest": {
     "modulePathIgnorePatterns": ["<rootDir>/xmpls/"]