[GR-11402] Treat CR and LF in readLine similar to GNU R.

ci_common/common.hocon

....r.runtime/src/com/oracle/truffle/r/runtime/RRuntime.java

.../com/oracle/truffle/r/runtime/conn/ConnectionSupport.java

...rc/com/oracle/truffle/r/runtime/conn/TextConnections.java

...est/src/com/oracle/truffle/r/test/ExpectedTestOutput.test

...acle/truffle/r/test/builtins/TestBuiltin_ISOdatetime.java

...oracle/truffle/r/test/builtins/TestBuiltin_asinteger.java

...oracle/truffle/r/test/builtins/TestBuiltin_operators.java

.../oracle/truffle/r/test/builtins/TestBuiltin_psigamma.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_quote.java

...m/oracle/truffle/r/test/library/base/TestConnections.java