Jackie Ng 4256a7cd07 [libgd] Fix static build (#6307)
* Revert libgd portfile change from 5ea9105

This makes libgd static buildable again

* Undo reversion of -DBUILD_SHARED_LIBS. This is not necessary.
2019-05-06 10:48:06 -07:00
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2019-05-06 10:48:06 -07:00