Shader compilation can take a while the first time; best not to
disable GL at that point. Have more of a hair trigger at other times.
Also explicitly exit if we appear to have hung in std::abort handling.

Conflicts:
	vcl/source/opengl/OpenGLHelper.cxx

Change-Id: I45f0873672f950fb3baba0ca859d854a0bb25064
Reviewed-on: https://gerrit.libreoffice.org/18265Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>