[PATCH] test-container: use IPv4 loopback for Squid proxy

["'Clara Kowalsky' via isar-users" <isar-users@googlegroups.com>]

APT package downloads run against the target rootfs, whose resolver
configuration may not resolve localhost. Running the test:

./scripts/run-tests.sh testsuite/citest.py:SingleTest.test_single_build \
  -p machine=qemuamd64 -p distro=trixie -p rootless=0 -p sstate=0

fails in rootfs_install_pkgs_download with:
Could not resolve 'localhost'

Fix this by pointing the proxy at 127.0.0.1 to avoid resolving its
hostname. The rootfs command shares the test container's network
namespace, so it can still reach Squid.

Signed-off-by: Clara Kowalsky <clara.kowalsky@siemens.com>
---
 testsuite/dockerdata/test-container-entrypoint | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testsuite/dockerdata/test-container-entrypoint b/testsuite/dockerdata/test-container-entrypoint
index 49771c15..8c3b3552 100755
--- a/testsuite/dockerdata/test-container-entrypoint
+++ b/testsuite/dockerdata/test-container-entrypoint
@@ -78,7 +78,7 @@ mkdir /isar
 
 busybox syslogd
 squid
-export http_proxy=http://localhost:3128
+export http_proxy=http://127.0.0.1:3128
 
 # Reuse the existing entrypoint script, exploiting that entry without
 # parameters drops us into a shell, rather then calling kas.
-- 
2.56.0

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