Fix TinyIPA POST job make clean call
Fix TinyIPA POST job make clean call

The script is calling make clean in the wrong directory, this patch
ensures we are in the right directory before calling the clean target.

Change-Id: Ic30dd6274c74dd4b7f0821e61af81f0fad8dafa1

Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config