Use parent folder for searching for uncommitted changes

All SSA components (ibssa, ibacm, plugin) have symbolic links
to sources actually placed out of component's main folder.
configure script searches for uncommitted changes only under
the main folder and dosen't recognize changes in common
source files in "shared" or "access" folders.
As a result, application version dosen't reflect actual status
of source files. It dosen't have "dirty" status event if
the sources were changed in working directory and not committed.

Signed-off-by: Sasha Kotchubievsky <sashakot@mellanox.com>
Signed-off-by: Hal Rosenstock <hal@mellanox.com>