Testsuite fixes to enable coroutine linking.

Testsuite fixes to enable coroutine linking.

This patch allows the remaining coroutine regression tests to
link with the new dynamic module ctors and new scaffold mechanism.

2022-06-27  Gaius Mulley  <gaius.mulley@southwales.ac.uk>

gcc/testsuite/gm2/ChangeLog:

	* coroutines/pim/run/pass/coroutines-pim-run-pass.exp
	(gm2_link_with) Assigned to "-lm2cor -lm2pim -lm2iso".
	* iso/run/pass/iso-run-pass.exp: Avoid linking the library module.
	* isocoroutines/run/pass/coroutine.mod (main): Renamed mainc.
	* isocoroutines/run/pass/isocoroutines-run-pass.exp
	(gm2_init_pim): Configure with -fscaffold-main
	-fno-scaffold-dynamic.
	* link/externalscaffold/pass/scaffold.c (_M2_SYSTEM_finish):
	Renamed _M2_SYSTEM_fini.  (_M2_M2RTS_finish) Renamed
	_M2_M2RTS_fini.  (_M2_RTExceptions_finish) Renamed
	_M2_RTExceptions_fini.  (_M2_hello_finish) Renamed
	_M2_hello_fini.
	* pim/options/optimize/run/pass/pim-options-optimize-run-pass.exp
	(gm2_link_with): Assigned to addition.o.
	* pim/run/pass/pim-run-pass.exp	(gm2_link_with): Assigned to sys.o.
	Avoid linking sys.mod.
	* pimcoroutines/run/pass/pimcoroutines-run-pass.exp
	(gm2_link_with): Assigned to "-lm2cor -lm2pim -lm2iso".
	* switches/check-all/run/fail/switches-check-all-run-fail.exp
	(gm2_link_with): Assigned to rangesupport.o.

Signed-off-by: Gaius Mulley <gaius.mulley@southwales.ac.uk>