Add questionable reducer tatic

rtree-c/src/ReduceC.hs

rtree-c/test/cases/small/rec.c

rtree-c/test/expected/array/reduction/r00000.c

rtree-c/test/expected/array/reduction/r00001.c

rtree-c/test/expected/array/reduction/r000100.c

rtree-c/test/expected/array/reduction/r000101.c

rtree-c/test/expected/array/reduction/r0001100.c

rtree-c/test/expected/array/reduction/r0001101.c

rtree-c/test/expected/array/reduction/r0001110.c

rtree-c/test/expected/array/reduction/r0001111.c

rtree-c/test/expected/array/reduction/r0010.c

rtree-c/test/expected/array/reduction/r0011.c

rtree-c/test/expected/array/reduction/r01000.c

rtree-c/test/expected/array/reduction/r01001.c

rtree-c/test/expected/array/reduction/r010100.c

rtree-c/test/expected/array/reduction/r010101.c

rtree-c/test/expected/array/reduction/r0101100.c

rtree-c/test/expected/array/reduction/r0101101.c

rtree-c/test/expected/array/reduction/r0101110.c

rtree-c/test/expected/array/reduction/r0101111.c