Close stream FD on ovni_thread_free()

This is required on FS like NFS as the cache coherence model states that
only after the file is closed the changes are actually propagated to the
server. It is not recomended to use NFS as OVNI_TMPDIR anyway.

Fixes: https://pm.bsc.es/gitlab/rarias/ovni/-/issues/168

CHANGELOG.md

@@ -26,6 +26,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Emulation models now have a semantic version (X.Y.Z) instead of just a number.
 - Install ovniver with the runpath set.
 
+### Fixed
+
+- Close stream FD on `ovni_thread_free()`.
+
 ## [1.4.1] - 2023-11-16
 
 ### Changed

src/rt/ovni.c

@@ -593,6 +593,10 @@ ovni_thread_free(void)
 	thread_metadata_store();
 
 	free(rthread.evbuf);
+	rthread.evbuf = NULL;
+
+	close(rthread.streamfd);
+	rthread.streamfd = -1;
 }
 
 int