MFH: r531772 r538330

Update to 11.4.3 and add an option for gf2x.

PR: 245109
Submitted by: /me
Approved by: ports-secteam (joenum)

math/ntl: Unbreak on systems incompatible with the system where the package was built

-march=native caused SEGVs on incompatible systems

Approved by: portmgr (unbreak)