Add needed --experimental-options for CI

Author: eregon

test/truffle/compiler/pe.sh

@@ -2,4 +2,4 @@
 
 source test/truffle/common.sh.inc
 
-jt ruby --graal --vm.Dgraal.TruffleCompilationExceptionsAreThrown=true --vm.Dgraal.TruffleIterativePartialEscape=true --basic_ops.inline=false test/truffle/compiler/pe/pe.rb "$@"
+jt ruby --graal --vm.Dgraal.TruffleCompilationExceptionsAreThrown=true --vm.Dgraal.TruffleIterativePartialEscape=true --experimental-options --basic_ops.inline=false test/truffle/compiler/pe/pe.rb "$@"

test/truffle/integration/backtraces.sh

@@ -7,7 +7,7 @@ do
   echo "$f"
   options=""
   if [ "$(basename "$f")" = "javascript.rb" ]; then
-    options="--single_threaded"
+    options="--experimental-options --single_threaded"
   fi
   jt ruby --no-core-load-path $options "$f"
 done