Reverted semantic error message so that Beremiz can parse them and that user can double-click on error message to open related POU and select the faulty line.

.project

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