Merge

...rc/com/oracle/truffle/r/engine/RRuntimeASTAccessImpl.java

...acle/truffle/r/nodes/builtin/base/DatePOSIXFunctions.java

...m/oracle/truffle/r/nodes/builtin/base/FrameFunctions.java

...in/src/com/oracle/truffle/r/nodes/builtin/base/Match.java

...fle.r.nodes/src/com/oracle/truffle/r/nodes/RASTUtils.java

...s/src/com/oracle/truffle/r/nodes/access/ConstantNode.java

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

...ntime/src/com/oracle/truffle/r/runtime/gnur/SEXPTYPE.java

...racle/truffle/r/test/library/base/TestSimpleBuiltins.java