tree d684738af1c71ade6df19742a18383e4b76e24e4
parent 3699dbe2e005334b49dffd4759df1fd13688ebef
author Yifan Hong <elsk@google.com> 1569625846 -0700
committer Yifan Hong <elsk@google.com> 1569625899 -0700

libsnapshot: Return path if snapshot is already merged

If snapshot is already merged, MapUpdateSnapshot
will only map the base device, but it doesn't return
the path. Now, it returns the path of the base device as well.

Test: libsnapshot_test

Change-Id: Ic56bc1a624651f24185c52401a3a01e8942d5d57