fficall refactor step 1

com.oracle.truffle.r.native/fficall/common/src/arithmetic.c

com.oracle.truffle.r.native/fficall/common/src/util.c

...racle.truffle.r.native/fficall/common/src/variable_defs.h

com.oracle.truffle.r.native/fficall/jni/Makefile

com.oracle.truffle.r.native/fficall/jni/src/Applic.c

com.oracle.truffle.r.native/fficall/jni/src/Connections.c

com.oracle.truffle.r.native/fficall/jni/src/Memory.c

com.oracle.truffle.r.native/fficall/jni/src/Parse.c

com.oracle.truffle.r.native/fficall/jni/src/Random.c

com.oracle.truffle.r.native/fficall/jni/src/Rdynload.c

com.oracle.truffle.r.native/fficall/jni/src/Rinternals.c

com.oracle.truffle.r.native/fficall/jni/src/Rmath.c

com.oracle.truffle.r.native/fficall/jni/src/Utils.c

...racle.truffle.r.native/fficall/jni/src/access_functions.c

com.oracle.truffle.r.native/fficall/jni/src/attrib.c

com.oracle.truffle.r.native/fficall/jni/src/coerce.c

com.oracle.truffle.r.native/fficall/jni/src/externalptr.c

com.oracle.truffle.r.native/fficall/jni/src/misc.c

com.oracle.truffle.r.native/fficall/jni/src/optim.c

com.oracle.truffle.r.native/fficall/jni/src/rfficall.c