SVN commit 13932 by rakuco: qtwebengine: Make `check-plist' finally pass.
In order for the Qt Designer plugin to be built and installed, we need to make a few changes: - Add `designer' to USE_QT5. - Pass `norecursive' to USES=qmake. Configuring everything at once during `make configure' causes the check for webenginewidgets in src/plugins/plugins.pro fail, so let us run qmake incrementally during the build. - With the `norecursive' change above, we also need to change what we pass to CONFIGURE_ENV and MAKE_ENV, now that gyp is run in do-build, not do-configure. M +10 -4 Makefile
