Insignificant flag is added for two targets. RedHat 7.6
will be kept as parallel until insignificant flag can be
removed from CentOS
Task-number: QTQAINFRA-2760
Task-number: QTQAINFRA-3065
Change-Id: If124600309644e6a066805cd728bf12862006a21
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>
It is used for compression of QtWebKit debug info, saving
about 1Gb (~40%) for non-compressed debug file of
libQt5WebKit.so, and ~50% of 7z-compressed debug package.
Version 0.12 provided in RedHat devtoolset exposes a bug
when applied to QtWebKit debug info:
https://sourceware.org/bugzilla/show_bug.cgi?id=24251
Change-Id: I0395aadfb7babbbc150f367f8b5dd296dc6d2064
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>
