osmo_io: Add io_uring backend

Change-Id: I5152129eb84b31ccc9e02bc2a5c5bdb046d331bc
diff --git a/contrib/libosmocore.spec.in b/contrib/libosmocore.spec.in
index fdd1a65..3fde143 100644
--- a/contrib/libosmocore.spec.in
+++ b/contrib/libosmocore.spec.in
@@ -32,6 +32,7 @@
 BuildRequires:  pkgconfig(talloc) >= 2.1.0
 BuildRequires:  pkgconfig(libmnl)
 BuildRequires:  pkgconfig(libsystemd)
+BuildRequires:  pkgconfig(liburing)
 
 %description
 libosmocore is a package with various utility functions that were