emulators/wine-devel: Update to Wine 6.12

This includes the following changes:

• Builtin "Blue" and "Classic Blue" themes.
• More work towards WinSock PE conversion.
• Beginnings of the NSI (Network Store Interface) implementation.
• Support for 32/64-bit registry views in reg.exe.
• Various bug fixes.

The Staging patch set is broken for this snapshot; mark the STAGING
option broken accordingly.

Add files/patch-nsiproxy.sys which addresses a build issue on
non-Linux platforms that I pushed upstream in the meantime.