[update] update to upstream commit 05148b6
Squashed 'qtquick1/' changes from dfe77c2..c3eae1e

c3eae1e Add changes-5.1.0 file
c558d84 qmlplugindump1: make it behave more like qmplugindump

git-subtree-dir: qtquick1
git-subtree-split: c3eae1e470b219c25d04cf4ad60eff665f11f1b7
Merge commit '18728963b194540ea2ff9e572893b1b49fd09cc2'