[bug#44978] Update vlang

[Ryan Prior]

Hi there! It would be good to get some feedback on this patch series, if you have any question or reservations!

Also, since it's related, some updates on vlang packaging efforts:

!

1) The next release will have support for multiple directores in the VMODULES environment variable, allowing us to use it as a search path similar to how we do GOPATH. This opens the door to a v-build-system and inclusion of packages for v libraries, which I'm researching how to contribute. This is the last v release where all the libraries have to be copied into a single directory.

2) The build system for compiling tools ahead-of-time has not been in good shape, but with some prodding from myself, it's improving. Hopefully by the next release we should have a fix for https://issues.guix.gnu.org/44978

Cheers,

Ryan