Make scripts executable

Author: code-asher

ci/build/npm-postinstall.sh

@@ -54,10 +54,14 @@ symlink_bin_script() {
   dest="$3"
   ext="${4-}"
   case $OS in
-    windows) symlink "$source.cmd" "$dest.cmd" ;;
+    windows)
+      ext=".cmd"
+      symlink "$source.cmd" "$dest$ext"
+      ;;
     darwin | macos) symlink "$source-darwin.sh" "$dest$ext" ;;
     *) symlink "$source-linux.sh" "$dest$ext" ;;
   esac
+  chmod +x "$dest$ext"
   cd "$oldpwd"
 }