consolidate native projects and be consistent in Makefiles

com.oracle.truffle.r.native/Makefile

com.oracle.truffle.r.native/builtinlibs/Makefile

...oracle.truffle.r.native/builtinlibs/lib/darwin/libR.dylib

...truffle.r.native/builtinlibs/lib/darwin/libRDerived.dylib

...le.truffle.r.native/builtinlibs/lib/darwin/libRblas.dylib

....truffle.r.native/builtinlibs/lib/darwin/libRlapack.dylib

...cle.truffle.r.native/builtinlibs/lib/linux/libRDerived.so

...oracle.truffle.r.native/builtinlibs/lib/linux/libRblas.so

...acle.truffle.r.native/builtinlibs/lib/linux/libRlapack.so

...cle.truffle.r.native/builtinlibs/lib/sunos/libRDerived.so

...oracle.truffle.r.native/builtinlibs/lib/sunos/libRblas.so

...acle.truffle.r.native/builtinlibs/lib/sunos/libRlapack.so

com.oracle.truffle.r.native/builtinlibs/src/dchdc.f

com.oracle.truffle.r.native/builtinlibs/src/dpbfa.f

com.oracle.truffle.r.native/builtinlibs/src/dpbsl.f

com.oracle.truffle.r.native/builtinlibs/src/dpoco.f

com.oracle.truffle.r.native/builtinlibs/src/dpodi.f

com.oracle.truffle.r.native/builtinlibs/src/dpofa.f

com.oracle.truffle.r.native/builtinlibs/src/dposl.f

com.oracle.truffle.r.native/builtinlibs/src/dqrdc.f