fixed CXXFLAGS for --debug

git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@4696 0b2b3880-5936-4365-a048-eb17d2e5a6bf
Temp fix for isue 826

git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@4697 0b2b3880-5936-4365-a048-eb17d2e5a6bf
A patch for issue 850

git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@4698 0b2b3880-5936-4365-a048-eb17d2e5a6bf
A patch for issue 850 --deleted a useless printf

git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@4699 0b2b3880-5936-4365-a048-eb17d2e5a6bf
sync with trunk r4701:4704

git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@4706 0b2b3880-5936-4365-a048-eb17d2e5a6bf
sync with r. 4708:4710

git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@4717 0b2b3880-5936-4365-a048-eb17d2e5a6bf