Allow installable_luap to display Unicode characters

installable_luap fails to display Unicode characters. Consider the following snippet:

print "∙";

This yields the following error:

./installable_luap Unicode.lua
Invalid character in ASCII string
current instr.: 'parrot;PCT;HLLCompiler;evalfiles' pc 1468 (compilers/pct/src/PCT/HLLCompiler.pir:756)
called from Sub 'parrot;PCT;HLLCompiler;command_line' pc 1719 (compilers/pct/src/PCT/HLLCompiler.pir:875)
called from Sub 'main' pc 27 (luap.pir:27)

This patch fixes the problem for installable_luap, but it remains for installable_lua

luap.pir

@@ -24,7 +24,7 @@ with the standard interface of PCT::HLLCompiler.
     $P0 = compreg 'lua'
     $S0 = "Compiler Lua 5.1 on Parrot  Copyright (C) 2005-2009, Parrot Foundation.\n"
     $P0.'commandline_banner'($S0)
-    $P0.'command_line'(args)
+    $P0.'command_line'(args, 'encoding'=>'utf8')
 .end
 
 =head1 AUTHOR