ci: export ASAN_OPTIONS

This allows splitting the `meson test` command on multiple lines.

Signed-off-by: Simon Ser <contact@emersion.fr>

.gitlab-ci/virtme-scripts/run-weston-tests.sh

@@ -21,9 +21,11 @@ export PATH=$HOME/.local/bin:$PATH
 /usr/local/bin/seatd &
 while ! [ -e /run/seatd.sock ]; do sleep 0.1; done
 
+export ASAN_OPTIONS=detect_leaks=0,atexit=1
+
 # run the tests and save the exit status
 # we give ourselves a very generous timeout multiplier due to ASan overhead
-ASAN_OPTIONS=detect_leaks=0,atexit=1 meson test --no-rebuild --timeout-multiplier 4
+meson test --no-rebuild --timeout-multiplier 4
 TEST_RES=$?
 
 # create a file to keep the result of this script: