Give enospc test more time to commit unlink.

The current test sequence performs the unlink and immediately tests
whether enough resources are available to create new files again, and
this consistently fails.

One of my crummy VMs takes a good 12 seconds before the `touch` actually
succeeds. We care about the filesystem eventually returning from ENOSPC,
and certainly we don't want it to take forever, but there is a period
after our first ENOSPC error and cleanup that we expect ENOSPC to fail
for a bit longer.

Make the timeout 120s. As soon as the `touch` completes, exit the wait
loop.

Signed-off-by: Auke Kok <auke.kok@versity.com>

tests/tests/enospc.sh

@@ -88,6 +88,11 @@ rm -rf "$SCR/xattrs"
 
 echo "== make sure we can create again"
 file="$SCR/file-after"
+C=120
+while (( C-- )); do
+	touch $file 2> /dev/null && break
+	sleep 1
+done
 touch $file
 setfattr -n user.scoutfs-enospc -v 1 "$file"
 sync