Merge branch 'lsan-leaks' into 'master'

Lsan leaks

See merge request !3104

.gitlab-ci/run-tests.sh

@@ -9,6 +9,7 @@ backend=$2
 
 # Ignore memory leaks lower in dependencies
 export LSAN_OPTIONS=suppressions=$srcdir/lsan.supp
+export G_SLICE=always-malloc
 
 case "${backend}" in
   x11)

lsan.supp

 leak:g_quark_init
 leak:xdg_mime_init
-leak:libc.so
 leak:libfontconfig.so
 leak:libEGL_mesa.so
 leak:iris_dri.so