PR modula2/114227 InstallTerminationProcedure does not work with -fiso

PR modula2/114227 InstallTerminationProcedure does not work with -fiso

This patch moves the initial/termination user procedure functionality in
pim and iso versions of M2RTS into M2Dependent.  This ensures that
finalization/initialization procedures will always be invoked for both -fiso
and -fpim.  Prior to this patch M2Dependent called M2RTS for
termination procedure cleanup and always invoked the pim M2RTS.

gcc/m2/ChangeLog:

	PR modula2/114227
	* gm2-libs-iso/M2RTS.mod (ProcedureChain): Remove.
	(ProcedureList): Remove.
	(ExecuteReverse): Remove.
	(ExecuteTerminationProcedures): Rewrite.
	(ExecuteInitialProcedures): Rewrite.
	(AppendProc): Remove.
	(InstallTerminationProcedure): Rewrite.
	(InstallInitialProcedure): Rewrite.
	(InitProcList): Remove.
	* gm2-libs/M2Dependent.def (InstallTerminationProcedure):
	New procedure.
	(ExecuteTerminationProcedures): New procedure.
	(InstallInitialProcedure): New procedure.
	(ExecuteInitialProcedures): New procedure.
	* gm2-libs/M2Dependent.mod (ProcedureChain): New type.
	(ProcedureList): New type.
	(ExecuteReverse): New procedure.
	(ExecuteTerminationProcedures): New procedure.
	(ExecuteInitialProcedures): New procedure.
	(AppendProc): New procedure.
	(InstallTerminationProcedure): New procedure.
	(InstallInitialProcedure): New procedure.
	(InitProcList): New procedure.
	* gm2-libs/M2RTS.mod (ProcedureChain): Remove.
	(ProcedureList): Remove.
	(ExecuteReverse): Remove.
	(ExecuteTerminationProcedures): Rewrite.
	(ExecuteInitialProcedures): Rewrite.
	(AppendProc): Remove.
	(InstallTerminationProcedure): Rewrite.
	(InstallInitialProcedure): Rewrite.
	(InitProcList): Remove.

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