extend mrb file format (add filename, lines info)

[akiray03]

extend mrb file format (lines and filename infos append to end of irep->pool).

sample source code

$ cat t.rb 
puts "sample"
raise "sample error"
$ ./bin/mrbc t.rb 

before (not output line numbers)

$ ./bin/mruby -b t.mrb 
sample
trace:
        [0] (unknown):-1
RuntimeError: sample error

after (output line numbers and original filename)

$ ./bin/mruby -b t.mrb 
sample
trace:
        [0] t.rb:2
t.rb:2: sample error (RuntimeError)

[masuidrive]

@matz Why do you accept this request?
I really want to use this feature!

[mattn]

:s/Why do you accept this request/Why don't you accept this request/

[mattn]

@masuidrive is this issue closable?

[masuidrive]

I think so.

[matz]

#1082 close this issue, I think.