Mark the IDO error files as binary instead of text as a way to avoid … #303

Job	Run time
Recompiling ido 5.3 for linux	1m 33s
Recompiling ido 7.1 for linux	1m 21s
Recompiling ido 5.3 for macos	2m 30s
Recompiling ido 7.1 for macos	1m 55s
Recompiling ido 5.3 for windows	3m 23s
Recompiling ido 7.1 for windows	2m 23s
Recompiling ido 5.3 for linux-arm	1m 58s
Recompiling ido 7.1 for linux-arm	1m 33s
	16m 36s

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