Move module.modulemap into Headers dir of executorch.xcframework (#12837)

Author: shoumikhin

scripts/build_apple_frameworks.sh

@@ -249,9 +249,9 @@ cp -r $FRAMEWORK_EXECUTORCH_HEADERS_PATH/executorch/runtime/core/portable_type/c
 
 cp "$SOURCE_ROOT_DIR/extension/apple/$FRAMEWORK_EXECUTORCH_MODULE_NAME/Exported/"*.h "$FRAMEWORK_EXECUTORCH_HEADERS_PATH/$FRAMEWORK_EXECUTORCH_MODULE_NAME"
 
-cat > "$FRAMEWORK_EXECUTORCH_HEADERS_PATH/$FRAMEWORK_EXECUTORCH_MODULE_NAME/module.modulemap" << EOF
+cat > "$FRAMEWORK_EXECUTORCH_HEADERS_PATH/module.modulemap" << EOF
 module ${FRAMEWORK_EXECUTORCH_MODULE_NAME} {
-  umbrella header "${FRAMEWORK_EXECUTORCH_MODULE_NAME}.h"
+  umbrella header "${FRAMEWORK_EXECUTORCH_MODULE_NAME}/${FRAMEWORK_EXECUTORCH_MODULE_NAME}.h"
   export *
 }
 EOF