Add the duma memory debugging library. This is based on an earlier
patch by Baruch Siach, with minor changes to build for latest
buildroot sources.
[Thomas P: misc cleanups, drop non-C++ support as it wasn't compiling,
added thread dependency.]
Signed-off-by: Reuben Dowle <reuben.dowle@4rf.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
