On systems where `coreutils` are built with `--enable-single-binary=symlinks` like Nix,
`/usr/bin/env` is symlinked to `/usr/bin/coreutils` and uses `argv[0]` to determine which program to run.
Since the `test-cli-extensions.sh` created a new symlink named `ostree-env`,
coreutils would be confused about the utility to choose, so running it would fail:
ostree-env: unknown program ‘ostree-env’
Try 'ostree-env --help' for more information.
Fixes: https://github.com/ostreedev/ostree/issues/2553
When a locale with C.utf8 in its name (e.g. es_EC.utf8) was installed
on a system, the C.utf8 locale was chosen, even when it was not available.
This patch fixes the grep pattern to match whole lines returned by locale -a.
See: #1592Closes: #1611
Approved by: cgwalters
Jan Tojnar