[patch] fix msggen.pl undefined getopts problem

[Dennis.Yxun <den...@gm...>]

hi dev:
 attached file is patch against Gentoo Linux which fix "undefined
getopts" problem
 please review, conside include it if looks good.

  Using Gentoo Linux as the build host, it fails without this patch
   Use Getopt::Std in place of getopts.pl.

   https://bugs.gentoo.org/show_bug.cgi?id=420083

   which following error:
   /usr/bin/perl -w ./../msggen.pl -l jstyleModule InterpreterMessages.msg
   /usr/bin/perl -w ./../msggen.pl -l jstyleModule DssslAppMessages.msg
   Undefined subroutine &main::Getopts called at ./../msggen.pl line 22.
   make[2]: *** [InterpreterMessages.h] Error 2
   make[2]: *** Waiting for unfinished jobs....
   Undefined subroutine &main::Getopts called at ./../msggen.pl line 22.
   make[2]: *** [DssslAppMessages.h] Error 2