Each of the four byte-order helpers computed the swap into Rax and then
returned via ctx.SetReturn(0). SetReturn writes its argument into Rax, so it
immediately overwrote the converted value with 0 and the guest saw every
sceNetHtonl / sceNetHtons / sceNetNtohl / sceNetNtohs call return 0.
Leave the swapped value in Rax and return ORBIS_GEN2_OK as the dispatch status
instead, matching how the value-returning exports in this file (e.g.
sceNetPoolCreate) already work.
Add a NetExports test suite covering the swaps, the 16-bit width masking, an
htonl/ntohl round-trip, and a regression guard that a non-zero input never
converts to 0.
can