[GR-8156] [GR-5066] Proper source sections for Rscript.

...oracle/truffle/r/engine/shell/EmbeddedConsoleHandler.java

...her/src/com/oracle/truffle/r/launcher/ConsoleHandler.java

.../com/oracle/truffle/r/launcher/DefaultConsoleHandler.java

...rc/com/oracle/truffle/r/launcher/JLineConsoleHandler.java

....launcher/src/com/oracle/truffle/r/launcher/RCommand.java

...her/src/com/oracle/truffle/r/launcher/RscriptCommand.java

...c/com/oracle/truffle/r/launcher/StringConsoleHandler.java

...rc/com/oracle/truffle/r/parser/DefaultRParserFactory.java

...ser/src/com/oracle/truffle/r/parser/ParserGeneration.java

...acle.truffle.r.parser/src/com/oracle/truffle/r/parser/R.g

...me/src/com/oracle/truffle/r/runtime/context/RContext.java

...runtime/src/com/oracle/truffle/r/runtime/nodes/RNode.java