Fix #if to match .csproj constant

src/Microsoft.DotNet.Configurer/Microsoft.DotNet.Configurer.csproj

@@ -9,6 +9,7 @@
     <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
     <RepositoryType>git</RepositoryType>
     <RepositoryUrl>git://github.com/dotnet/cli</RepositoryUrl>
+    <DefineConstants Condition="'$(IncludeAspNetCoreRuntime)' == 'false'">$(DefineConstants);EXCLUDE_ASPNETCORE</DefineConstants>
   </PropertyGroup>
 
   <ItemGroup>

src/dotnet/AspNetCoreCertificateGenerator.cs

@@ -9,7 +9,7 @@ namespace Microsoft.DotNet.Cli
     {
         public void GenerateAspNetCoreDevelopmentCertificate()
         {
-#if !EXCLUDE_ASPNET
+#if !EXCLUDE_ASPNETCORE
             Microsoft.AspNetCore.DeveloperCertificates.XPlat.CertificateGenerator.GenerateAspNetHttpsCertificate();
 #endif
         }