CI: Change ci_build.sh to use bash instead of sh.

This script is only meant to be run as part of the CI build/test process
on machines that are known to have bash (Ubuntu and MacOS). If this
assumption changes in the future, then the bash specific commands will
need to be replaced with a more portable option. For now, it is
convenient to use bash commands.

diff --git a/build-aux/ci_build.sh b/build-aux/ci_build.sh
index 3b462e635fb0aac1f67f509a8751491448763ecf..0a9dc09bf906a8890700ff81f9142d78577df8b9 100755 (executable)
--- a/build-aux/ci_build.sh
+++ b/build-aux/ci_build.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 #############################################################################
 #