Remove blacklists of old glib and gcc 4.8 debug builds

We never saw the same failure with gcc 4.8 debug builds with 55-based,
and the other failure suspected to related turned out not to be and
have been fixed.

So try to re-enable gcc 4.8 debug builds, and other old platforms but
explicitly disable gcc 4.9.1 which fails to compile Chromium.

Change-Id: Ib0a8ac33aafbd12d31e374dfd23f056b4ba1adf0
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

0 files changed, 0 insertions, 0 deletions