Test-out make FontForge.pot as per htdocs... (vs prior copy-n-paste steps)

...either the docs need to match the steps required to make a po file,
or the make files could be modified to match the steps shown in the docs.
Merge pull request #954 from JoesCat/master

Test-out make FontForge.pot as per htdocs... (vs prior copy-n-paste step...