Disable test-specifying-pidns.sh under 'meson dist' while I investigate

This test is hanging when run under 'meson dist' for some reason, but
not when run under 'meson test', and not locally, only in the Github
Workflow-based CI. Disable it for now.

Signed-off-by: Simon McVittie <smcv@collabora.com>

.github/workflows/check.yml

@@ -110,7 +110,7 @@ jobs:
         ( cd DESTDIR && find -ls )
     - name: dist
       run: |
-        BWRAP_MUST_WORK=1 meson dist -C _build
+        BWRAP_MUST_WORK=1 CI_MESON_DIST=1 meson dist -C _build
     - name: Collect dist test logs on failure
       if: failure()
       run: mv _build/meson-private/dist-build/meson-logs/testlog.txt test-logs/disttestlog.txt || true

tests/test-specifying-pidns.sh

@@ -10,6 +10,8 @@ echo "1..1"
 # This test needs user namespaces
 if test -n "${bwrap_is_suid:-}"; then
     echo "ok - # SKIP no setuid support for --unshare-user"
+elif test -n "${CI_MESON_DIST:-}"; then
+    echo "not ok - # TODO this test hangs under 'meson dist' during Github Workflow CI"
 else
     mkfifo donepipe
     $RUN --info-fd 42 --unshare-user --unshare-pid sh -c 'readlink /proc/self/ns/pid > sandbox-pidns; cat < donepipe' >/dev/null 42>info.json &