Import Project path when evaluated to more than 256 chars fails rather than skipping to import

[shahabhijeet]

For e.g. let's assume here is an import as below

<PackageName>ReallyLongString</PackageName>
<Scope>Foo</Scope>
<Import Project="$(LibrarySourceFolder)\$(Scope)\**\*$(PackageName).nuget.proj" Condition=" '$(Scope)' != 'all' " />

If the entire path is less than 256 and unable to evaluate to a valid path, it skips to import.
But if the entire path exceeds 256, it errors out saying, cannot import and prints the unevaluated literal path.

Actual: Errors out and prints literal unevaluated path
Expected: Skip importing project even if the path exceeds 256
Have consistent behavior in both cases.

[rainersigwald]

This is a combination of #53 ("MAX_PATH exists") and #406 ("wildcard expansion returns the input when a recursive glob exceeds MAX_PATH").

[rainersigwald]

Closing since we have those other two issues.