[WIP] fix up bridge module bugs

[m3ngyang]

bridge module doesn't work currently. This pr aims to fix the problem. #51

[danintel]

The build failed because you are missing a "DCO line".
For you it will be something like:

Signed-off-by: m3ngyang yangm3ng@gmail.com

For details, see
https://github.com/hyperledger-labs/trusted-compute-framework/blob/master/CONTRIBUTING.md

This is a legal requirement of The Linux Foundation and the Hyperledger consortium.

Rebase your commit and force push to update.

[danintel]

1 GByte is very small. The space for the file is not allocated until used, so 1 TByte allows room to grow.

[m3ngyang]

1 GB is only for local test, which won't be included in the final commit.

[Ram-srini]

@m3ngyang Can you please update your commit with sign off message.

[m3ngyang]

@Ram-srini singed off. but this pr is not finished.