enable passing tests

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

...rc/com/oracle/truffle/r/test/builtins/TestBuiltin_Im.java

...rc/com/oracle/truffle/r/test/builtins/TestBuiltin_Re.java

...src/com/oracle/truffle/r/test/builtins/TestBuiltin_c.java

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

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

...m/oracle/truffle/r/test/builtins/TestBuiltin_subset2.java

...racle/truffle/r/test/builtins/TestBuiltin_substitute.java

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

...oracle/truffle/r/test/library/base/TestSimpleVectors.java

...rc/com/oracle/truffle/r/test/library/stats/TestStats.java