host_apex_verifier: Add --fsckerofs argument

The tool invokes deapexer which relies on debugfs/fsckerofs. deapexer
complains when fsckerofs is missing and ANDROID_HOST_OUT is not set. To
satisfy deapexer, host_apex_verifier needs --fsckerofs as well.

Btw, for convenience, we search tools under ANDROID_HOST_OUT when it's
set.

Bug: 223896570
Test: host_apex_verifier --apex=<apex> runs
Change-Id: I1e7c23dff2241604e972c6b60806f769458e661d
1 file changed