the sample does not work with the new CloudShell version based on Amazon Linux 2023

[davidecoccia]

recenty AWS migrated all CloudShell to Amazon Linux 2023 https://docs.aws.amazon.com/cloudshell/latest/userguide/cloudshell-AL2023-migration.html
This effectively breaks the building of the zbar library, as it depends on EPEL which is not available in Amazon Linux 2023 https://docs.aws.amazon.com/linux/al2023/ug/compare-with-al2.html#epel
during the execution of setup.shyou will get the below error

Barcode-QR-Decoder-Lambda/src/code/setup.sh: line 34: autoreconf: command not found

[davidecoccia]

fixed by #5