hg: build-infra/jdk8: * On Solaris, "date +%s" is not available, use ugly workaround.

[magnus.ihse.bursie at oracle.com]

Changeset: f1b93a9cbb30
Author:    ihse
Date:      2012-08-31 13:04 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/f1b93a9cbb30

* On Solaris, "date +%s" is not available, use ugly workaround.
* On Solaris, test in /bin/sh does not support -e. Use /usr/bin/test.

! common/autoconf/autogen.sh