This seems to be a good idea based on several discussions
in the project. In the end catching SEH exceptions is just
going to cause strange platform dependent bahavior.

This patch is based on on
http://thread.gmane.org/gmane.comp.documentfoundation.libreoffice.scm/39102/focus=55516
and includes some additional cleanup of the sal signal code.

Change-Id: Iedc998e37e6495afec445eccb60fa1c2b1a7defd
Reviewed-on: https://gerrit.libreoffice.org/26497Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>