Enable wasm addFunction/removeFunction to support calling FPDF_SaveAsCopy from js

Author: Schibum

modules/wasm.py

@@ -591,8 +591,9 @@ def run_task_generate():
                 "{0}".format("-g" if config == "debug" else "-O2"),
                 "-s",
                 f"EXPORTED_FUNCTIONS={complete_functions_list}",
+                "-s", "ALLOW_TABLE_GROWTH",
                 "-s",
-                'EXPORTED_RUNTIME_METHODS=\'["ccall", "cwrap", "wasmExports", "HEAP8", "HEAP16", "HEAP32", "HEAPU8", "HEAPU16", "HEAPU32", "HEAPF32", "HEAPF64"]\'',
+                'EXPORTED_RUNTIME_METHODS=\'["ccall", "cwrap", "wasmExports", "HEAP8", "HEAP16", "HEAP32", "HEAPU8", "HEAPU16", "HEAPU32", "HEAPF32", "HEAPF64", "addFunction", "removeFunction"]\'',
                 "custom.cpp",
                 lib_file_out,
                 "-I{0}".format(include_dir),