lib/oelite: Fix use of subdir parameter handling in fetcher unpack
lib/oelite: Fix use of subdir parameter handling in fetcher unpack

Always chdir back to cwd after unpack.

sknsean/core,sknsean/core,diorcety/oe-lite-core,hundeboll/core,hundeboll/core,hundeboll/core,diorcety/oe-lite-core,sknsean/core,sknsean/core,hundeboll/core,sknsean/core