libbrillo: Add GetDaemonPathForTemporaryUserHome to cryptohome utilities

Similar to GetDaemonPath, GetDaemonPathForTemporaryUserHome returns
the directory where the passed daemon should store its data for a
temporary user home mount.

TEST=Tests still pass, actual functionality tested by CL

Change-Id: I06efeed13bc611bab9baa542de47d9f7112e792e
Commit-Ready: Pavol Marko <>
Tested-by: Pavol Marko <>
Reviewed-by: Dan Erat <>
2 files changed