[LTP] [PATCH ltp] tools/apicmds/.gitignore: add tst_flush

[Cyril Hrubis]

Hi!
Fix pushed in:

commit fc42ec9f78b644e8dfaa9fdda55e6c781ce88441
Author: Cyril Hrubis <chrubis@suse.cz>
Date:   Tue Mar 27 15:41:39 2018 +0200

    tools/apicmds: Remove tst_flush from Makefile

Thanks for catching this!

-- 
Cyril Hrubis
chrubis@suse.cz