Add error codes for file read/write/open failures #1061
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I wanted to raise something more specific than AWS_ERROR_SYS_CALL_FAILURE when an S3 operation failed due to an failed fwrite() to disk. Then it seemed weird to add a WRITE_FAILURE code, but no READ_FAILURE or OPEN_FAILURE codes.
Description of changes:
AWS_ERROR_FILE_(OPEN/READ/WRITE)_FAILUREaws_translate_and_raise_io_error()that lets you suggest a fallback error-code if no good match is foundDebatable Issues:
aws-c-io already has AWS_IO_STREAM_READ_FAILED. This makes it weird to add AWS_ERROR_FILE_READ_FAILURE to aws-c-common. In a perfect world, we'd move the error from aws-c-io to aws-c-common and possibly rename it, but either of those actions would be a breaking change.
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.