Update patches to stable branch 1750

Change-Id: I85149bf4405420813d07bee5259f11a192e86a73
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
Reviewed-by: Zoltan Arvai <zarvai@inf.u-szeged.hu>
Force disable libstdc++ debug mode

This reduces the debug library size by about 20%
which should make it possible again to successfully
link on the CI.

Change-Id: Id0ced6b821032eb49a8e34aff81a7e1648a3dfff
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
Add overrides to RenderWidgetHostViewQt on Windows

More overrides for not yet implemented methods after
snapshot update.

Change-Id: I2fb7c7a4c7ae2094ccf0d791a75d268fc03f1602
Reviewed-by: Andras Becsi <andras.becsi@digia.com>