Add file and line information to exceptions thrown from Lua

[mjanicek]

Exceptions thrown from Lua programs do not include the filename and line information as they do in PUC-Lua. E.g.:

$ rembulan
Rembulan 0.1-SNAPSHOT (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_60)
> nil + 1
attempt to perform arithmetic on a nil value
stack traceback:
   (omitted)

$ lua
Lua 5.3.3  Copyright (C) 1994-2016 Lua.org, PUC-Rio
> nil + 1
stdin:1: attempt to perform arithmetic on a nil value
stack traceback:
  (omitted)

(It's about the stdin:1 prefix of the error message.)

Debugging Lua programs is difficult without this information.

[mkarneim]

Indeed, this would be really helpful.