sqs_get_message response parser doesn't work

[soulfly]

Looks like sqs_get_message response parser doesn't work at all

I have fixed it in this commit, please merge

https://github.com/soulfly/aws4c/commit/a67297f785f4c94b10ab4fc0300579401feee921

[soulfly]

And this commit as well
https://github.com/soulfly/aws4c/commit/24c47c9358b418b1cec2154dba0aac326d357a2f