[PATCH-for-5.2? v5 1/2] tests/docker: Install liblttng-ust-dev package in Ubuntu 20.04 image

[Philippe Mathieu-Daudé]

Install the liblttng-ust-dev package to be able to
build QEMU using the User-Space Tracer trace backend
(configure --enable-trace-backends=ust).

Suggested-by: Wainer dos Santos Moschetta <waine...@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com>
---
Cc: Stefan Hajnoczi <stefa...@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com>
---
 tests/docker/dockerfiles/ubuntu2004.docker | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/docker/dockerfiles/ubuntu2004.docker 
b/tests/docker/dockerfiles/ubuntu2004.docker
index 355bbb3c638..ae889d8482c 100644
--- a/tests/docker/dockerfiles/ubuntu2004.docker
+++ b/tests/docker/dockerfiles/ubuntu2004.docker
@@ -23,6 +23,7 @@ ENV PACKAGES flex bison \
     libiscsi-dev \
     libjemalloc-dev \
     libjpeg-turbo8-dev \
+    liblttng-ust-dev \
     liblzo2-dev \
     libncurses5-dev \
     libncursesw5-dev \
-- 
2.26.2