modula2: issue the parameter incompatibility error message based on dialect

This tiny patch improves the parameter incompatibility error message by
having a different message for the dialect chosen mentioning the specific
violation.  PIM uses assignment rules for pass by value and expression
rules for pass by reference.  ISO uses expression type checking for
pass by value and pass by reference.

gcc/m2/ChangeLog:

	* gm2-compiler/M2FileName.def (CalculateFileName): Remove
	quoted string in comment.
	* gm2-compiler/M2Range.mod (FoldTypeParam): Generate dialect
	specific parameter incompatibility error message.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>