.gitlab-ci.yml: disable jemalloc in kresd

`libfaketime` and `jemalloc` is an incompatible combination.

.gitlab-ci.yml

@@ -71,7 +71,7 @@ test:comparative:kresd:
     - git clone --recurse-submodules -j8 --depth=1 https://gitlab.nic.cz/knot/knot-resolver.git /tmp/kresd-local-build
     - pushd /tmp/kresd-local-build
     - git log -1
-    - meson build_local --default-library=static --prefix=/tmp/.local
+    - meson build_local --default-library=static -Dmalloc=disabled --prefix=/tmp/.local
     - ninja -C build_local install
     - popd
     # compare results from latest Deckard with results from merge base
@@ -95,7 +95,7 @@ test:latest:kresd:
     - git clone --recurse-submodules -j8 --depth=1 https://gitlab.nic.cz/knot/knot-resolver.git kresd-local-build
     - pushd kresd-local-build
     - git log -1
-    - meson build_local --default-library=static --prefix="$PWD/../.local"
+    - meson build_local --default-library=static -Dmalloc=disabled --prefix="$PWD/../.local"
     - ninja -C build_local install
     - popd
     - TMPDIR=$(pwd) PATH=$(pwd)/.local/sbin:$PATH ./kresd_run.sh -n $(nproc)