wpa_cli: Fix process termination in wpa_cli action mode case

wpa_cli: Fix process termination in wpa_cli action mode case

Commit 4be9f27595f313773612d2fe534c013dfedfe679 ('wpa_cli: Use eloop
during connection attempts in interactive mode') did not take into
account the needs for signal processing in action mode. eloop_run() was
not called in this case and the internal select() loop would block eloop
processing anyway and prevent clean shutdown. Fix this by using eloop
for action mode operations.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>