lj_record.c: Record IFUNC/IFUNCV the same as FUNC/FUNCV

Record calls to blacklisted functions the same way as calls to
uncompiled functions. This allows for the possibility that a
blacklisted function can be successfully recorded as part of a larger
trace.

If the function truly cannot be compiled into other traces then it
will continue to abort and lead to more blacklistings, at the cost of
some extra "due diligence" by the JIT to avoid false-negatives. This
is perfectly in line with the RaptorJIT goal of blacklisting code
conservatively and taking pains to find successful traces.

This change does not affect the treatment blacklisted loops. Those may
or may not deserve further consideration.

Resolves raptorjit/raptorjit#119.

src/lj_record.c

@@ -2284,8 +2284,6 @@ void lj_record_ins(jit_State *J)
   case BC_IFORL:
   case BC_IITERL:
   case BC_ILOOP:
-  case BC_IFUNCF:
-  case BC_IFUNCV:
     lj_trace_err(J, LJ_TRERR_BLACKL);
     break;
 
@@ -2297,13 +2295,15 @@ void lj_record_ins(jit_State *J)
   /* -- Function headers -------------------------------------------------- */
 
   case BC_FUNCF:
+  case BC_IFUNCF:
     rec_func_lua(J);
     break;
   case BC_JFUNCF:
     rec_func_jit(J, rc);
     break;
 
   case BC_FUNCV:
+  case BC_IFUNCV:
     rec_func_vararg(J);
     rec_func_lua(J);
     break;