The good news

The good news is firebird_empty.odb simple test is is ok (fdb file is created in tmp area and queries work) as seen in the trace https://gist.github.com/mariuz/ecfbab056136b8736bda

info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/Driver.cxx:54: FirebirdDriver_CreateInstance()
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/Driver.cxx:166: connect(), URL: sdbc:embedded:firebird
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/Connection.cxx:173: Temporary .fdb location:  /tmp/lu3385bwxulf.tmp/firebird.fdb
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/DatabaseMetaData.cxx:851: getTypeInfo()
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/Connection.cxx:883: buildTypeInfo(). Type info built.
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/Connection.cxx:891: buildTypeInfo(). Closed.
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/Statement.cxx:111: executeQuery(SELECT DISTINCT indices.RDB$INDEX_NAME FROM RDB$INDICES indices JOIN RDB$INDEX_SEGMENTS index_segments ON (indices.RDB$INDEX_NAME = index_segments.RDB$INDEX_NAME) JOIN RDB$RELATION_FIELDS relation_fields ON (index_segments.RDB$FIELD_NAME = relation_fields.RDB$FIELD_NAME) JOIN RDB$FIELDS fields ON (relation_fields.RDB$FIELD_SOURCE = fields.RDB$FIELD_NAME) WHERE (indices.RDB$SYSTEM_FLAG = 0) AND ((fields.RDB$FIELD_TYPE = 14)      OR (fields.RDB$FIELD_TYPE = 37)) AND (indices.RDB$INDEX_INACTIVE IS NULL OR indices.RDB$INDEX_INACTIVE = 0) )
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/ResultSet.cxx:79: OResultSet().
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/StatementCommonBase.cxx:111: close
info:connectivity.firebird:3385:1:connectivity/source/drivers/firebird/StatementCommonBase.cxx:111: close

We need to modify the file firebird_integer_x64le.odb used in the qa tests (dbaccess/qa/unit/firebird.cxx) to include a fbk instead of fdb http://lists.freedesktop.org/archives/libreoffice-commits/2013-September/057217.html