[osg] Fix error C3861: '_FPOSOFF': identifier not found

[FrankXie05]

Fix error:

D:\b\osg\src\raph-3.6.5-c3f8c61ada.clean\src\osgPlugins\osga\OSGA_Archive.cpp(80): error C3861: '_FPOSOFF': identifier not found

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version.
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

Upstream issue: openscenegraph/OpenSceneGraph#1323

[BillyONeal]

Thanks for the fix!