Use portable shell syntax for build.sh
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Key: AVRO-827
URL: https://issues.apache.org/jira/browse/AVRO-827
Project: Avro
Issue Type: Improvement
Components: build
Environment: Operating systems with a POSIX compliant {{/bin/sh}}.
Reporter: Joseph Koshy
Avro's {{build.sh}} script cannot be executed by a POSIX compatible {{sh}}.
{quote}
% /bin/sh build.sh
build.sh: 24: function: not found
{quote}
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