Fix baseline test logic to allow for multi-project outputs

Author: SteveSandersonMS

src/ProjectTemplates/test/BaselineTest.cs

@@ -88,9 +88,12 @@ public async Task Template_Produces_The_Right_Set_Of_FilesAsync(string arguments
                 if (relativePath.EndsWith(".csproj", StringComparison.Ordinal) ||
                     relativePath.EndsWith(".fsproj", StringComparison.Ordinal) ||
                     relativePath.EndsWith(".props", StringComparison.Ordinal) ||
+                    relativePath.EndsWith(".sln", StringComparison.Ordinal) ||
                     relativePath.EndsWith(".targets", StringComparison.Ordinal) ||
                     relativePath.StartsWith("bin/", StringComparison.Ordinal) ||
-                    relativePath.StartsWith("obj/", StringComparison.Ordinal))
+                    relativePath.StartsWith("obj/", StringComparison.Ordinal) ||
+                    relativePath.Contains("/bin/", StringComparison.Ordinal) ||
+                    relativePath.Contains("/obj/", StringComparison.Ordinal))
                 {
                     continue;
                 }