Removes core/ from the include dirs for libutil, to simplify using drfrontendlib with drcontainers at the same time without hitting a conflict between drcontainers/hashtable.h and core/hashtable.h.
Removes core/ from the include dirs for libutil, to simplify using drfrontendlib with drcontainers at the same time without hitting a conflict between drcontainers/hashtable.h and core/hashtable.h.