main/qtwebbrowser: add missing dependencies (MR 2012)

`qt5-qtquickcontrols` and `qt5-qtgraphicaleffects` are needed, else
qtwebbrowser shows a blackscreen on start.

[ci:skip-build]: already built successfully in CI

main/qtwebbrowser/APKBUILD

 pkgname=qtwebbrowser
 pkgver=1.0
-pkgrel=0
+pkgrel=1
 pkgdesc="Qt web browser"
 url="http://doc.qt.io/QtWebBrowser/"
 arch="all !armhf !armv7" # armhf: pmaports#75, armv7: build.postmarketos.org#72
 license="GPLv3"
-depends="qt5-qtbase qt5-qtwebengine qt5-qtvirtualkeyboard mesa-dev"
+depends="qt5-qtbase qt5-qtwebengine qt5-qtvirtualkeyboard qt5-qtquickcontrols qt5-qtgraphicaleffects mesa-dev"
 makedepends="qt5-qtbase-dev qt5-qtwebengine-dev busybox"
 install="qtwebbrowser.post-install"
 source="$pkgname-$pkgver.tar.gz::https://github.com/qtproject/qt-apps-qtwebbrowser/archive/v$pkgver.tar.gz qtwebbrowser.svg startup-qtwebbrowser.sh qtwebbrowser.desktop 0001-Patch-for-usability-on-postmarketOS.patch"