Update submodules on '5.6' in qt5

Change-Id: I34bab96a9ec73aa07e1295250aa85528f306a679
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>

diff --git a/qtbase b/qtbase
index 4e53159..24bd7fd 160000 (submodule)
--- a/qtbase
+++ b/qtbase
@@ -1 +1 @@
-Subproject commit 4e53159d431e39c03488517588669ae2cc9052d1
+Subproject commit 24bd7fd6518985f00e4102c2702ef50a8852b731

diff --git a/qtmultimedia b/qtmultimedia
index 6817067..a8fe4b9 160000 (submodule)
--- a/qtmultimedia
+++ b/qtmultimedia
@@ -1 +1 @@
-Subproject commit 6817067ff72c4493ab39fd065c9382568da06378
+Subproject commit a8fe4b989b2002d3fcb4e33afe16bd6fd2ff192b