Use MSBuild to create empty dirs in output

Dist/Package.sh

@@ -8,7 +8,6 @@ find "output" -type f \( -wholename "output/EmuHawk.exe" -o -wholename "output/D
 	-not -wholename "output/dll/*.xml" -not -wholename "output/dll/libsneshawk-64*.exe" -not -wholename "output/dll/gpgx.elf" -not -wholename "output/dll/miniclient.*" \
 	-exec install -D -m644 "{}" "packaged_{}" \;
 cd "$targetDir"
-mkdir "Firmware"
 if [ "$1" = "windows-x64" ]; then
 	rm -f "EmuHawkMono.sh"
 	cd "dll"

src/MainSlnExecutable.props

@@ -20,5 +20,6 @@
 		</ItemGroup>
 		<Move Condition=" $(IsTargetingNetFramework) " SourceFiles="@(NotExecFilesFromExecProj)" DestinationFolder="$(OutputPath)dll/" />
 		<Move SourceFiles="@(ExecutableAndConfigFromExecProj)" DestinationFiles="@(ExecutableAndConfigFromExecProj->Replace($(MSBuildProjectName), $(ProjectNameTail)))" /> <!-- keep assembly name as e.g. `BizHawk.Client.EmuHawk`, but rename file to simply `EmuHawk.exe` as we've been doing -->
+		<MakeDir Directories="$(OutputPath)ExternalTools;$(OutputPath)Firmware;$(OutputPath)Tools" />
 	</Target>
 </Project>