avoid copying into a new vector when casting a ForeignWrapper

...om/oracle/truffle/r/nodes/builtin/fastr/FastRInspect.java

...src/com/oracle/truffle/r/nodes/unary/CastComplexNode.java

.../src/com/oracle/truffle/r/nodes/unary/CastDoubleNode.java

...src/com/oracle/truffle/r/nodes/unary/CastIntegerNode.java

.../src/com/oracle/truffle/r/nodes/unary/CastStringNode.java

...com/oracle/truffle/r/runtime/data/closures/RClosures.java

...ffle/r/runtime/data/closures/RToComplexVectorClosure.java

...uffle/r/runtime/data/closures/RToDoubleVectorClosure.java

.../truffle/r/runtime/data/closures/RToIntVectorClosure.java

...truffle/r/runtime/data/closures/RToListVectorClosure.java

...uffle/r/runtime/data/closures/RToStringVectorClosure.java

...cle/truffle/r/runtime/data/closures/RToVectorClosure.java

...le/truffle/r/runtime/data/nodes/FastPathVectorAccess.java

...le/truffle/r/runtime/data/nodes/SlowPathVectorAccess.java

...com/oracle/truffle/r/runtime/data/nodes/VectorAccess.java

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

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