build: work around bug in MSBuild v16.10.0

This allows to build Node.js at the (temporary) cost of longer build
times.

Refs: #38872
Refs: https://github.com/dotnet/msbuild/releases/tag/v16.10.0
Refs: dotnet/msbuild#6465
Refs: dotnet/msbuild#6373

PR-URL: #38873
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>

vcbuild.bat

@@ -334,6 +334,8 @@ if "%target%"=="Build" (
   if defined cctest set target="Build"
 )
 if "%target%"=="node" if exist "%config%\cctest.exe" del "%config%\cctest.exe"
+@rem TODO(targos): Remove next line after MSBuild 16.10.1 is released.
+if "%target%"=="node" set target="Build"
 if defined msbuild_args set "extra_msbuild_args=%extra_msbuild_args% %msbuild_args%"
 @rem Setup env variables to use multiprocessor build
 set UseMultiToolTask=True