Since PostgreSQL 9.4 it's possible to build with different uuid
libraries. Eversince, the postgres docs [1] have this to say:
[..] the OSSP UUID library [..] is not well maintained, and is
becoming increasingly difficult to port to newer platforms. [..]
On Linux, OS X, and some other platforms, suitable functions are
provided in the libuuid library, which originally came from the
e2fsprogs project (though on modern Linux it is considered part of
util-linux-ng).
Using e2fs for Darwin was introduced 9 years ago in #8574, which library
to use for Linux was never considered again. Thus, start building with
newer libs now.
As a side effect, we require one less patch if we decide to build with
meson later.
[1]: https://www.postgresql.org/docs/current/uuid-ossp.html
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