ignore .dll and generated files

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13625 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
ignore also .dll files

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13626 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
config/Makefile.mingw: additions to make the testsuite work

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13627 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
tests/typing-poly: round a float to avoid failed tests due to different display precision

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13628 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
tests/lib-threads: skip test3 on windows

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13629 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
ignore .dll files

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13630 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02