more support for foreign wrappers

...m/oracle/truffle/r/ffi/impl/nodes/RandFunctionsNodes.java

...src/com/oracle/truffle/r/nodes/builtin/base/AsVector.java

...acle/truffle/r/nodes/access/vector/ExtractVectorNode.java

...oracle/truffle/r/nodes/builtin/casts/CastForeignNode.java

...untime/src/com/oracle/truffle/r/runtime/FastROptions.java

...oracle/truffle/r/runtime/data/RForeignBooleanWrapper.java

.../oracle/truffle/r/runtime/data/RForeignDoubleWrapper.java

...com/oracle/truffle/r/runtime/data/RForeignIntWrapper.java

.../oracle/truffle/r/runtime/data/RForeignStringWrapper.java

...rc/com/oracle/truffle/r/runtime/data/RForeignWrapper.java

.../com/oracle/truffle/r/runtime/interop/ForeignArray2R.java

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

.../oracle/truffle/r/test/library/fastr/TestJavaInterop.java