Update astro/geographiclib to 1.4.9

Highlights:

• Update from 1.4.6 to 1.4.9
• MAGNETIC_EMM2017 model addd
• Switched to CMake for build

head/tail usage must be patched to avoid use of --lines; work is in progress
to eventually grow this long-option alternative to -n so that such patching
isn't necessary at some point in the future.

PR: 218158
Approved by: ak (ports), Tatsuki Makino (maintainer)