[GR-65845] Prevent -H:ExcludeResources=... from excluding directory resources. #11477
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When specifying an ExcludeResources pattern that does remove resources files from a resource directory it can happen easily that accidentally the resource-directory gets exuded as well.
Suppose a user adds
-H:ExcludeResources=^resdir/(?!required_res/).*
to prevent any resources in resdir that do not match this pattern to get included. Due to having the pattern not only matched against a resourceName but also resourceName + "/" we will accidentally also exclude the "resdir" directory resource. This can break user applications that check for the existence of that directory resource at runtime.