MIPS64, part 2: Add MIPS64 hard-float JIT compiler backend.

Contributed by Djordje Kovacevic and Stefan Pejic from RT-RK.com.
Sponsored by Cisco Systems, Inc.

src/jit/dump.lua

@@ -85,7 +85,7 @@ local nexitsym = 0
 local function fillsymtab_tr(tr, nexit)
   local t = {}
   symtabmt.__index = t
-  if jit.arch == "mips" or jit.arch == "mipsel" then
+  if jit.arch:sub(1, 4) == "mips" then
     t[traceexitstub(tr, 0)] = "exit"
     return
   end