Review swap - rename

[Orion Poplawski]

This is a package rename, pretty simple:

https://bugzilla.redhat.com/show_bug.cgi?id=1029197
Rename Request: gshhg-gmt-nc4 - Global Self-consistent Hierarchical
High-resolution Geography (GSHHG)

Needed for GMT 5.

-- 
Orion Poplawski
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