overlay: add gw2-64.exe to the default launcher-filter program whitelist.
overlay: add gw2-64.exe to the default launcher-filter program whitelist.

The original launcher filter PR only added the 32-bit Guild Wars 2 client.
This adds the 64-bit client.

Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble