Feature Request: allow for custom `createLinkName` function

[bdkent]

I would love to be able to customize the link names created by createLinkName.

Currently doing a crossProject results in some enormous link names for me. It becomes pretty tedious to tell the different links apart quickly as there is so much redundant path info at the beginning whereas the only meaningful bit is at the end.

Alternatively, instead of full customization, another solution might be to have some builtin link naming convention for known CrossTypes (ie, CrossType.Pure or CrossType.Full) that reduces some of the redundancy.