[update] eglfsvb to 17cd8f1
Squashed 'qtbase/src/plugins/platforms/eglfsvb/' changes from 546c7d7..17cd8f1

17cd8f1 Prevent buffer swap during direct rendering

git-subtree-dir: qtbase/src/plugins/platforms/eglfsvb
git-subtree-split: 17cd8f1a26fbba1ffb1ce4a3b7e222432af88e4c
Merge commit 'daef98e600bb417f161d15ab9a0e52356bcfc04f'