hg: jdk9/sandbox: 8174069: Verify that bash is at least version 3.2

[chris.hegarty at oracle.com]

Changeset: 98503c50ee77
Author:    ihse
Date:      2017-02-07 12:17 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/98503c50ee77

8174069: Verify that bash is at least version 3.2
Reviewed-by: erikj

! common/autoconf/basics.m4
! common/autoconf/generated-configure.sh