sprintf() deal with PHP_INT_MIN (Int64.MinValue)
sprintf() deal with PHP_INT_MIN (Int64.MinValue)

- correct number -> string conversion using invariant number format
- ref https://github.com/peachpiecompiler/peachpie/issues/922
- avoids ovrf exception on PHP_INT_MIN

peachpiecompiler/peachpie,peachpiecompiler/peachpie,iolevel/peachpie-concept,iolevel/peachpie-concept,peachpiecompiler/peachpie,iolevel/peachpie-concept