Based on the test case 668 (cxx-type.at:437) "GLR: Merge conflicting parses, pure, locations". * examples/c/glr/Makefile, examples/c/glr/README.md, * examples/c/glr/c++-types.test, examples/c/glr/c++-types.y, * examples/c/glr/local.mk: New.