Revised GCCE workaround for Bug 2926 - must use :zip export to ensure that the various files are present before any builds are attempted, otherwise there is "no rule to make usrt3_1.lib" and no attempt is made to link any executables even after the extension makefiles are executed.

EXPORTS
	_Z7Export1v @ 1 NONAME ; Export1()
	_Z7Export2v @ 2 NONAME ; Export2()
	_Z7Export3v @ 3 NONAME ; Export3()
	_Z7Export4v @ 4 NONAME ABSENT ; Export4()
	_Z7Export5i @ 5 NONAME ABSENT ; Export5(int)
	_Z7Export6i @ 6 NONAME ; Export6(int)