Cast pipelines made static

...com/oracle/truffle/r/library/grDevices/DevicesCCalls.java

...com/oracle/truffle/r/library/graphics/GraphicsCCalls.java

.../src/com/oracle/truffle/r/library/grid/GridFunctions.java

...oracle/truffle/r/library/methods/MethodsListDispatch.java

...ibrary/src/com/oracle/truffle/r/library/methods/Slot.java

...om/oracle/truffle/r/library/methods/SubstituteDirect.java

...brary/src/com/oracle/truffle/r/library/stats/BinDist.java

...library/src/com/oracle/truffle/r/library/stats/Cdist.java

...src/com/oracle/truffle/r/library/stats/CompleteCases.java

...ibrary/src/com/oracle/truffle/r/library/stats/Covcor.java

...ibrary/src/com/oracle/truffle/r/library/stats/Cutree.java

.../src/com/oracle/truffle/r/library/stats/DoubleCentre.java

...src/com/oracle/truffle/r/library/stats/RMultinomNode.java

...om/oracle/truffle/r/library/stats/RandFunctionsNodes.java

...m/oracle/truffle/r/library/stats/StatsFunctionsNodes.java

...ary/src/com/oracle/truffle/r/library/tools/C_ParseRd.java

...rary/src/com/oracle/truffle/r/library/tools/DirChmod.java

....library/src/com/oracle/truffle/r/library/tools/Rmd5.java

...ary/src/com/oracle/truffle/r/library/tools/ToolsText.java

...y/src/com/oracle/truffle/r/library/utils/CountFields.java