ALLJOYN-1491: Generate both static and shared versions of object files accoding to LIBTYPE.

Change-Id: Ife4ebf9b4eead82e0974baa95a68d70da975d578
ALLJOYN-2217: Add Debug.h and StringUtil.h to dist/cpp/inc/qcc/.

Change-Id: I9ed7802df22868ff56c79aff2b659e271b9ed674