fixup! (file_op_context_t): reorder members. #112

Job	Run time
call-build-fedora / build-fedora	1m 56s
call-build-solaris / build-solaris	5m 46s
call-build-alpine / build-alpine	2m 8s
call-build-freebsd / build-freebsd	2m 58s
call-build-ubuntu / build-ubuntu	3m 21s
call-build-macos / build-macos	1m 38s
	17m 47s

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