[POC] - Move PSL1GHT net code to newlib

[dee12452]

In order to address ps3dev/PSL1GHT#67, one of the items was to remove net code from PSL1GHT and add it to the ps3 newlib.

This in theory would do just that. This implementation is taken from the libnet sprx which uses known supported vsh net functions documented here https://www.psdevwiki.com/ps3/VSH_Exports. The idea would be to leave the VSH exports over in PSL1GHT (for now) with a net/net.h exposing the export functions from the netlib sprx until the NID database can be hooked up to.

I'm also not too familiar with newlib and how it's configured / integrated with PSL1GHT currently, so any info / feedback there would be good too.

Thanks for looking!

[dee12452]

Closing for now, as I don't think I have a good enough understanding of ps3 newlib configurations atm for this to be relevant