Prefer libHcurses over libcurses

Prefer libHcurses over libcurses

Use the HP-UX-specific libHcurses instead of libcurses, like we used
to. Otherwise we fail to link some gtx programs.

Reviewed-on: http://gerrit.openafs.org/3583
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit 651f66b0ffed08da82b352e3e252a03b8b13c780)

Change-Id: I6c3c7e219548c0694dc84d167535cacbbfbb1e02
Reviewed-on: http://gerrit.openafs.org/4079
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>