Add very big array test for AST traversal

Author: brianrourkeboll

tests/FSharp.Compiler.UnitTests/FSharp.Compiler.UnitTests.fsproj

@@ -75,6 +75,7 @@
     </Compile>
     <Compile Include="TreeVisitorTests.fs" />
     <Compile Include="ParsedInputModuleTests.fs" />
+    <Compile Include="ParsedInputModuleTests.VeryBigArrayExprTest.fs" />
   </ItemGroup>
 
   <ItemGroup>