absolute path for GLPI_ROOT, see #4179

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20012 35612d4c-9d10-0410-837c-bf9dd1be60d7
absolute path for GLPI_ROOT, fixed #4179

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20013 35612d4c-9d10-0410-837c-bf9dd1be60d7
absolute path for GLPI_ROOT, see #4179

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20014 35612d4c-9d10-0410-837c-bf9dd1be60d7