upgrade emsdk to 4.0.4 (microsoft#23819)

### Description

Upgrade EMSDK to 4.0.4


### Motivation and Context

Emscripten v4.0.4 brings 2 useful changes that are helpful for webgpu:

- emscripten-core/emscripten#23678
- emscripten-core/emscripten#23631

Author: fs-eire

.gitmodules

@@ -7,4 +7,4 @@
 [submodule "cmake/external/emsdk"]
 	path = cmake/external/emsdk
 	url = https://github.com/emscripten-core/emsdk.git
-	branch = 4.0.3
+	branch = 4.0.4

cmake/external/emsdk

@@ -503,7 +503,7 @@ def convert_arg_line_to_args(self, arg_line):
     # WebAssembly build
     parser.add_argument("--build_wasm", action="store_true", help="Build for WebAssembly")
     parser.add_argument("--build_wasm_static_lib", action="store_true", help="Build for WebAssembly static library")
-    parser.add_argument("--emsdk_version", default="4.0.3", help="Specify version of emsdk")
+    parser.add_argument("--emsdk_version", default="4.0.4", help="Specify version of emsdk")
 
     parser.add_argument("--enable_wasm_simd", action="store_true", help="Enable WebAssembly SIMD")
     parser.add_argument("--enable_wasm_threads", action="store_true", help="Enable WebAssembly multi-threads support")

tools/ci_build/build.py

@@ -88,15 +88,15 @@ jobs:
     - script: |
         set -ex
         cd '$(Build.SourcesDirectory)/cmake/external/emsdk'
-        ./emsdk install 4.0.3 ccache-git-emscripten-64bit
-        ./emsdk activate 4.0.3 ccache-git-emscripten-64bit
+        ./emsdk install 4.0.4 ccache-git-emscripten-64bit
+        ./emsdk activate 4.0.4 ccache-git-emscripten-64bit
       displayName: 'emsdk install and activate ccache for emscripten'
   - ${{if eq(parameters.WithCache, false)}}:
     - script: |
         set -ex
         cd '$(Build.SourcesDirectory)/cmake/external/emsdk'
-        ./emsdk install 4.0.3
-        ./emsdk activate 4.0.3
+        ./emsdk install 4.0.4
+        ./emsdk activate 4.0.4
       displayName: 'emsdk install and activate ccache for emscripten'
 
   - template: build-linux-wasm-step.yml