This patch reverts 388c4ef9f7. The reason is that it generates a symbol
(resource_init_function) based on the name of the pro-file. But if different
plugins are built from a pro-file with the same name, you end up linking in
many symbols with the same name as well. Which one that ends up being used at
runtime will typically depend on the linking order of the plugins.
This problem will happen if you build an app for iOS that uses both controls 1
and controls 2. In that case, both QML plugins are built from a "controls.pro"
file. At runtime, only one of the plugins will be imported correctly.
This patch therefore reverts 388c4ef9f7, but at the same time, to not
re-introduce the problem it fixed, we instead genereate both a debug and release
version of the plugin_resources.cpp file. That way we can still depend on the
TARGET variable for generating both the resource_init_function symbol and the
cpp file.
Fixes: QTBUG-62647
Fixes: QTBUG-71386
Fixes: QTBUG-72108
Change-Id: I3d8c53132458b30ed9f47a259f1f8e4fa4d44130
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>