32 bit desktop releases - i686

[0pcom]

there have been several requests for i686 / 32 bit desktop releases of skywire - for linux / windows.

if it's possible, these should be included on the release of v1.3.29

I will package the linux binary release for i686 and include them in the apt repo.

For Windows, this may require an additional .msi

@mrpalide it's up to you if you want to change the default release binaries for windows & macOS to the compilation of cmd/skycoin-skywire instead of cmd/skywire. I've tested running the skycoin wallet from there and it works on linux.

Gui sources are embedded but one must still specify a gui dir (any dir that exists) in order for the daemon to run, if the gui is enabled.