meson: roll back to Meson 1.0 as a requirement
What does this MR do and why?
meson: roll back to Meson 1.0 as a requirement
It doesn't give us quite as many nice things as 1.1 does, but it still
allows us to do away with some special casing of versions, and does get
a number of new features we might want. This is required to continue
building on debian stable using the provided Meson.