various formatting and import cleanups

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

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

...iltin/src/com/oracle/truffle/r/nodes/builtin/base/Im.java

...ltin/src/com/oracle/truffle/r/nodes/builtin/base/Mod.java

...iltin/src/com/oracle/truffle/r/nodes/builtin/base/Re.java

...ltin/src/com/oracle/truffle/r/nodes/builtin/base/Rev.java

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

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

...odes/src/com/oracle/truffle/r/nodes/unary/ConvertInt.java

...es/src/com/oracle/truffle/r/nodes/unary/ToStringNode.java

...odes/src/com/oracle/truffle/r/nodes/unary/TypeofNode.java

...com/oracle/truffle/r/runtime/ffi/jnr/JNR_RFFIFactory.java

...e/src/com/oracle/truffle/r/runtime/RPackageVariables.java

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

...rc/com/oracle/truffle/r/runtime/VisibilityController.java

.../src/com/oracle/truffle/r/runtime/data/RAttributable.java

...me/src/com/oracle/truffle/r/runtime/data/RAttributes.java

...ntime/src/com/oracle/truffle/r/runtime/data/RBounded.java

...ntime/src/com/oracle/truffle/r/runtime/data/RComplex.java

...untime/src/com/oracle/truffle/r/runtime/data/RDouble.java