oe-debuginfod: add option for data storage

oe-debuginfod: add option for data storage

Storing the data files under $HOME can be unreliable if debuginfod
is used for several projects, especially if $HOME is shared
between machines.  We provide an option to save files under the
project directory.  The default behavior is unchanged.

(From OE-Core rev: e1e0cf82f559077e2a51447baf137086202c0c4a)

Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>