Update exit builder script
Debian builds where not compatible with centos, so this patch
successfully gets us building with cross gnu
-FROM debian:11.3
-RUN apt-get update && apt-get install clang-6.0 libclang-6.0-dev llvm-dev libssl-dev postgresql-server-dev-all -y
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+FROM rustembedded/cross:x86_64-unknown-linux-gnu-0.2.1
+RUN apt-get update && apt-get install libssl-dev postgresql-server-dev-all -y
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