Test - Add RuntimeIdentifiers and fix build.ps1

- Seems the Nuget restore doesn't work correctly without having RuntimeIdentifiers set
  Must also set RuntimeIdentifier manually so the files are copied correctly.
- Move the msbuild restore after the vcvarsall.bat call so the script runs successfully

CefSharp.Test/CefSharp.Test.csproj

@@ -1,8 +1,9 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <TargetFramework>net472</TargetFramework>
         <OutputType>Library</OutputType>
         <Platforms>x86;x64</Platforms>
+        <RuntimeIdentifiers>win7-x86;win7-x64</RuntimeIdentifiers>
         <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
         <UseWindowsForms>true</UseWindowsForms>
         <UseWPF>true</UseWPF>
@@ -11,11 +12,11 @@
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(PlatformTarget)' == 'x86'">
-        <RuntimeIdentifier Condition="'$(RuntimeIdentifier)' == ''">win-x86</RuntimeIdentifier>
+        <RuntimeIdentifier Condition="'$(RuntimeIdentifier)' == ''">win7-x86</RuntimeIdentifier>
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(PlatformTarget)' == 'x64'">
-        <RuntimeIdentifier Condition="'$(RuntimeIdentifier)' == ''">win-x64</RuntimeIdentifier>
+        <RuntimeIdentifier Condition="'$(RuntimeIdentifier)' == ''">win7-x64</RuntimeIdentifier>
     </PropertyGroup>
 
     <ItemGroup>

build.ps1

@@ -192,6 +192,9 @@ function Msvs
     }
 
     $Arch = TernaryReturn ($Platform -eq 'x64') 'x64' 'win32'
+
+	# Restore Nuget packages
+	&msbuild /t:restore /p:Platform=$Arch /p:Configuration=Release $CefSln
 
     $Arguments = @(
         "$CefSln",
@@ -263,9 +266,6 @@ function NugetPackageRestore
     # Restore packages
     . $nuget restore CefSharp.Core.Runtime\packages.CefSharp.Core.Runtime.config -PackagesDirectory packages
     . $nuget restore CefSharp.BrowserSubprocess.Core\packages.CefSharp.BrowserSubprocess.Core.config -PackagesDirectory packages
-
-	# Restore for any platform is fine, doesn't seem to matter which one long as it's successful
-	&msbuild /t:restore /p:Platform=x64 /p:Configuration=Release CefSharp3.sln
 }
 
 function Nupkg