enable passing tests

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

...uffle/r/test/testrgen/TestrGenBuiltinasDatecharacter.java

...truffle/r/test/testrgen/TestrGenBuiltinasDatedefault.java

.../truffle/r/test/testrgen/TestrGenBuiltinasDatefactor.java

...truffle/r/test/testrgen/TestrGenBuiltinasDatenumeric.java

...e/truffle/r/test/testrgen/TestrGenBuiltinascharacter.java

...m/oracle/truffle/r/test/testrgen/TestrGenBuiltinattr.java

...acle/truffle/r/test/testrgen/TestrGenBuiltindfltWarn.java

...test/testrgen/TestrGenBuiltinextract_parentasis_Date.java

...le/truffle/r/test/testrgen/TestrGenBuiltinminus_Date.java

...cle/truffle/r/test/testrgen/TestrGenBuiltinoperators.java

...cle/truffle/r/test/testrgen/TestrGenBuiltinplus_Date.java

...acle/truffle/r/test/testrgen/TestrGenBuiltinstrptime.java

...oracle/truffle/r/test/testrgen/TestrGenBuiltinsubset.java

...racle/truffle/r/test/testrgen/TestrGenBuiltinsubset2.java

...cle/truffle/r/test/testrgen/TestrGenBuiltintruncDate.java

.../truffle/r/test/testrgen/TestrGenBuiltinweekdaysDate.java