Added a helper script that can check whether all required files are present before release generation.

tools/release/pre_release_check_files_present.sh

@@ -0,0 +1,48 @@
+cd ../../engine/bin/
+
+files=(
+  # Windows
+  "godot.windows.opt.64.exe"
+  "godot.windows.opt.debug.64.exe"
+  "godot.windows.opt.tools.64.exe"
+  
+  # Linux
+  "godot.x11.opt.64"
+  "godot.x11.opt.debug.64"
+  "godot.x11.opt.tools.64"
+
+  # JS
+  "godot.javascript.opt.tools.threads.zip"
+  "godot.javascript.opt.zip"
+  # Android
+
+  "android_debug.apk"
+  "android_release.apk"
+
+  # OSX - Editor
+  "Godot.app.zip"
+
+  # OSX - export templates
+  "osx.zip"
+
+  # Pi4
+  "godot.x11.pi4.opt.32"
+  "godot.x11.pi4.opt.debug.32"
+  "godot.x11.pi4.opt.tools.32"
+)
+
+error=0
+
+for f in ${files[*]} 
+do
+if [ ! -e $f ]; then
+  error=1
+  echo "$f is not present!"
+fi
+done
+
+if [ $error -eq 0 ]; then
+  echo "All files are present!"
+fi
+
+cd ../..