OS-7095 Want risc-v disassembler

*** 21,30 ****
--- 21,31 ----
  #
  # Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  # Copyright 2012 Joshua M. Clulow <josh@sysmgr.org>
  # Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
+ # Copyright (c) 2018, Joyent, Inc.
  #
  
  #
  # The build process for libdisasm is sightly different from that used by other
  # libraries, because libdisasm must be built in two flavors - as a standalone
*** 56,92 ****
                          $(SRC)/common/dis/i386/dis_tables.c
  SRCS_sparc=             $(COMDIR)/dis_sparc.c \
                          $(COMDIR)/dis_sparc_fmt.c \
                          $(COMDIR)/dis_sparc_instr.c
  SRCS_s390x=             $(COMDIR)/dis_s390x.c
  
  OBJECTS_i386=           dis_i386.o \
                          dis_tables.o
  OBJECTS_sparc=          dis_sparc.o \
                          dis_sparc_fmt.o \
                          dis_sparc_instr.o
  OBJECTS_s390x=          dis_s390x.o
  
  #
  # We build the regular shared library with support for all architectures.
  # The standalone version should only contain code for the native
  # architecture to reduce the memory footprint of kmdb.
  #
  OBJECTS_library=        $(OBJECTS_common) \
                          $(OBJECTS_i386) \
                          $(OBJECTS_sparc) \
!                         $(OBJECTS_s390x)
  OBJECTS_standalone=     $(OBJECTS_common) \
                          $(OBJECTS_$(MACH))
  OBJECTS=                $(OBJECTS_$(CURTYPE))
  
  include $(SRC)/lib/Makefile.lib
  
  SRCS_library=           $(SRCS_common) \
                          $(SRCS_i386) \
                          $(SRCS_sparc) \
!                         $(SRCS_s390x)
  SRCS_standalone=        $(SRCS_common) \
                          $(SRCS_$(MACH))
  SRCS=                   $(SRCS_$(CURTYPE))
  
  #
--- 57,97 ----
                          $(SRC)/common/dis/i386/dis_tables.c
  SRCS_sparc=             $(COMDIR)/dis_sparc.c \
                          $(COMDIR)/dis_sparc_fmt.c \
                          $(COMDIR)/dis_sparc_instr.c
  SRCS_s390x=             $(COMDIR)/dis_s390x.c
+ SRCS_riscv=             $(COMDIR)/dis_riscv.c
  
  OBJECTS_i386=           dis_i386.o \
                          dis_tables.o
  OBJECTS_sparc=          dis_sparc.o \
                          dis_sparc_fmt.o \
                          dis_sparc_instr.o
  OBJECTS_s390x=          dis_s390x.o
+ OBJECTS_riscv=          dis_riscv.o
  
  #
  # We build the regular shared library with support for all architectures.
  # The standalone version should only contain code for the native
  # architecture to reduce the memory footprint of kmdb.
  #
  OBJECTS_library=        $(OBJECTS_common) \
                          $(OBJECTS_i386) \
                          $(OBJECTS_sparc) \
!                         $(OBJECTS_s390x) \
!                         $(OBJECTS_riscv)
  OBJECTS_standalone=     $(OBJECTS_common) \
                          $(OBJECTS_$(MACH))
  OBJECTS=                $(OBJECTS_$(CURTYPE))
  
  include $(SRC)/lib/Makefile.lib
  
  SRCS_library=           $(SRCS_common) \
                          $(SRCS_i386) \
                          $(SRCS_sparc) \
!                         $(SRCS_s390x) \
!                         $(SRCS_riscv) \
  SRCS_standalone=        $(SRCS_common) \
                          $(SRCS_$(MACH))
  SRCS=                   $(SRCS_$(CURTYPE))
  
  #