Added GnuR tests infrastructure in gnur/tests and all extracted tests.

.gitignore

ci.hocon

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

com.oracle.truffle.r.native/gnur/tests/README

com.oracle.truffle.r.native/gnur/tests/src/CRANtools.R

....truffle.r.native/gnur/tests/src/Examples/Sweave-test-1.R

...oracle.truffle.r.native/gnur/tests/src/Examples/base-Ex.R

....truffle.r.native/gnur/tests/src/Examples/example-1_def.R

...ffle.r.native/gnur/tests/src/Examples/example-1_myA-noF.R

....truffle.r.native/gnur/tests/src/Examples/example-1_myA.R

...e.truffle.r.native/gnur/tests/src/Examples/grDevices-Ex.R

...le.truffle.r.native/gnur/tests/src/Examples/graphics-Ex.R

...racle.truffle.r.native/gnur/tests/src/Examples/stats-Ex.R

...racle.truffle.r.native/gnur/tests/src/Examples/tools-Ex.R

...racle.truffle.r.native/gnur/tests/src/Examples/utils-Ex.R

com.oracle.truffle.r.native/gnur/tests/src/PCRE.R

com.oracle.truffle.r.native/gnur/tests/src/any-all.R

com.oracle.truffle.r.native/gnur/tests/src/arith-true.R

com.oracle.truffle.r.native/gnur/tests/src/arith.R

com.oracle.truffle.r.native/gnur/tests/src/array-subset.R