hg: panama/dev: manual merge with default

[maurizio.cimadamore at oracle.com]

Changeset: 64641df28e9f
Author:    mcimadamore
Date:      2018-02-05 10:50 +0000
URL:       http://hg.openjdk.java.net/panama/dev/rev/64641df28e9f

manual merge with default

- make/autoconf/autogen.sh
- make/autoconf/generated-configure.sh