OS-1723 DTrace should speak JSON (review fixes)

*** 50,59 ****
--- 50,60 ----
  DTRACE_INC_32   = -I$(UTSBASE)/sparc/v7
  DTRACE_INC_64   = -I$(UTSBASE)/sparc/v9
  
  CFLAGS += $(CCVERBOSE)
  CPPFLAGS += $(DTRACE_INC_$(CLASS))
+ CPPFLAGS += -I$(SRC)/common/util
  
  DTRACE_XAS_32   = -xarch=v8plus
  DTRACE_XAS_64   = -xarch=v9
  
  AS_CPPFLAGS     += $(DTRACE_INC_64)