Cross-platform msitools do not support the `Environment` directive,
which should be the proper way to update %PATH%, so we adapt
the Makefile to assume a Windows environment when building, addressing #1374.
`make dist` now runs on all platforms, but on Windows, assuming
`candle.exe`, `light.exe` and GNU `tar` are installed, it builds
all tarballs, zip and msi packages.
On other platforms it will only build the tarballs.
We also address some other issues with msitools
and change the GUID for UpgradeCode which caused
the wazero package to be mistaken for func-e
when installing/uninstalling both on the same
machine.
Signed-off-by: Edoardo Vacchi <evacchi@users.noreply.github.com>
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