Update submodules on '5.6.2' in qt5

Change-Id: I337a9d4897efe57d3ac09d9981bb2b07f96a9d87
Reviewed-by: Jani Heikkinen <jani.heikkinen@qt.io>

diff --git a/qtbase b/qtbase
index f050f21..b4ada3f 160000 (submodule)
--- a/qtbase
+++ b/qtbase
@@ -1 +1 @@
-Subproject commit f050f2180ffb8298de802b33ad9f017312df1815
+Subproject commit b4ada3f0d8feed7dbff22aa780d38ab126020ac6

diff --git a/qtrepotools b/qtrepotools
index 471da8d..7b54379 160000 (submodule)
--- a/qtrepotools
+++ b/qtrepotools
@@ -1 +1 @@
-Subproject commit 471da8d402b5d7b5cf3a1d95b29e06edfd141699
+Subproject commit 7b5437939280b0788b4caa4a83f9193cfe8f97e7