ECC check in bitread failing on good bitstreams

[litghost]

Bitstreams from Vivado are failing the ECC check in bitread. This likely indicates there is something about the ECC calculation that is misunderstood. For now, ECC checking has been disabled. Once bitread is fixed, the checks should be re-enabled:

The -E flag disables errors on ECC check failures. There are two locations where the -E is being added:

https://github.com/SymbiFlow/prjuray/blob/02b31b5d7c19f66f50b3a28218921433df8a9af8/utils/bit2fasm.py#L38-L41

https://github.com/SymbiFlow/prjuray/blob/02b31b5d7c19f66f50b3a28218921433df8a9af8/utils/environment.sh#L35