linux: Replace '127.0.0.1' with 'localhost'

Nit: Using "localhost" is a best practice and is consistent with
every other local invocation of anisble-playbook in kdevops.

Signed-off-by: Chuck Lever <[email protected]>

Author: chucklever

playbooks/bootlinux-local.yml

@@ -1,5 +1,5 @@
 ---
-- hosts: 127.0.0.1
+- hosts: localhost
   connection: local
   roles:
     - role: bootlinux-local

workflows/linux/Makefile

@@ -90,8 +90,8 @@ LINUX_HELP_EXTRA :=
 
 PHONY += linux
 linux: $(KDEVOPS_NODES)
-	$(Q)ansible-playbook $(ANSIBLE_VERBOSE) -i \
-		'127.0.0.1,' $(KDEVOPS_PLAYBOOKS_DIR)/bootlinux-local.yml \
+	$(Q)ansible-playbook $(ANSIBLE_VERBOSE) \
+		$(KDEVOPS_PLAYBOOKS_DIR)/bootlinux-local.yml \
 		--extra-vars="$(BOOTLINUX_ARGS)"
 	$(Q)ansible-playbook $(ANSIBLE_VERBOSE) -i \
 		$(KDEVOPS_HOSTFILE) $(KDEVOPS_PLAYBOOKS_DIR)/bootlinux.yml \