[wasm] Add memalign to exported functions (#65316)

* [wasm] Add memalign to exported functions

Fix #64724 and #64725

The tests were crashing because calling the memalign function, which was
not exported.

* Re-enable failing tests

src/libraries/tests.proj

@@ -41,10 +41,6 @@
   <ItemGroup Condition="'$(TargetOS)' == 'Browser' and '$(BuildAOTTestsOnHelix)' == 'true' and '$(RunDisabledWasmTests)' != 'true' and '$(RunAOTCompilation)' == 'true' and '$(BrowserHost)' == 'Windows'">
     <!-- https://github.com/dotnet/runtime/issues/61756 -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.RegularExpressions\tests\System.Text.RegularExpressions.Tests.csproj" />
-    <!-- https://github.com/dotnet/runtime/issues/64724 -->
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.HostFactoryResolver\tests\Microsoft.Extensions.HostFactoryResolver.Tests.csproj" />
-    <!-- https://github.com/dotnet/runtime/issues/64725 -->
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.Logging\tests\Common\Microsoft.Extensions.Logging.Tests.csproj" />
   </ItemGroup>
 
   <!-- Projects that don't support code coverage measurement. -->

src/mono/wasm/wasm.proj

@@ -72,7 +72,7 @@
       <_EmccLinkFlags Include="-s FORCE_FILESYSTEM=1" />
       <_EmccLinkFlags Include="-s EXPORTED_RUNTIME_METHODS=&quot;['FS','print','ccall','cwrap','setValue','getValue','UTF8ToString','UTF8ArrayToString','FS_createPath','FS_createDataFile','removeRunDependency','addRunDependency']&quot;" />
       <!-- _htons,_ntohs,__get_daylight,__get_timezone,__get_tzname are exported temporarily, until the issue is fixed in emscripten, https://github.com/dotnet/runtime/issues/64724  -->
-      <_EmccLinkFlags Include="-s EXPORTED_FUNCTIONS=_free,_malloc,_htons,_ntohs,__get_daylight,__get_timezone,__get_tzname" />
+      <_EmccLinkFlags Include="-s EXPORTED_FUNCTIONS=_free,_malloc,_htons,_ntohs,__get_daylight,__get_timezone,__get_tzname,_memalign" />
       <_EmccLinkFlags Include="--source-map-base http://example.com" />
       <_EmccLinkFlags Include="-s STRICT_JS=1" />
       <_EmccLinkFlags Include="-s EXPORT_NAME=&quot;'createDotnetRuntime'&quot;" />