Added tracking of order by which tokens are processed by lexical analyser.
This helps in correctly formating error messages when constructs begin in one file, and end in another.

.project

syntax: regexp
\.o$
syntax: regexp
^iec2c$
syntax: regexp
^iec2iec$
syntax: regexp
\.depend$
syntax: regexp
^stage1_2/iec\.(y|flex)\..*$