configure_in_place broken in bazel 0.28.1

[slam]

This only happens to rule_foreign_cc builds using the configure rule with configure_in_place turned on. It fails with an error like this:

__________________________PKG_CONFIG_PATH=
bazel-out/k8-opt/bin/external/com_facebook_faiss/faiss/logs/Configure_script.sh: line 74: /tmp/tmp.83MMt3zWJ8/configure: No such file or directory

_____ END BUILD LOGS _____

Narrowed it down to bazel changing the http archives in external to a symlink, like so:

$ ls -ld bazel-u4/external/com_facebook_faiss
lrwxrwxrwx 1 root root 91 Aug  7 01:06 bazel-u4/external/com_facebook_faiss -> /root/.cache/bazel/_bazel_root/129a8b5e1f972fe0890644e192abc210/external/com_facebook_faiss

vs bazel 0.27.0:

$ ls -ld bazel-ubiquity/external/com_facebook_faiss
drwxr-xr-x 2 root root 4096 Aug  7 01:15 bazel-ubiquity/external/com_facebook_faiss

PR incoming.