Commit
ece9e817eaf1e1232e5aa0d814e8451c569fcf70
by Oliver Smithosmo-ns-master: build without uring for debian 10
In preparation for running FR tests with debian 10, adjust
osmo-ns-master to build libosmocore without uring support as
liburing-dev is not packaged for debian 10.
Related: OS#6494#note-19
Change-Id: I1278bc3435c791c429b38a21b53c8efe20e741df