Update submodules on '5.6' in qt5

Change-Id: Ic9d3ad8264dfc543f8bac4bda81b82c7f92fe176
Reviewed-by: Liang Qi <liang.qi@qt.io>

diff --git a/qtbase b/qtbase
index ca4d93d..4b6784b 160000 (submodule)
--- a/qtbase
+++ b/qtbase
@@ -1 +1 @@
-Subproject commit ca4d93d85ee446c5e30ec8e7814651e45cbf1218
+Subproject commit 4b6784b49c6dcf0add9ec0cbb4ad97cd191c2aa3

diff --git a/qtconnectivity b/qtconnectivity
index b6bf84e..cb439dd 160000 (submodule)
--- a/qtconnectivity
+++ b/qtconnectivity
@@ -1 +1 @@
-Subproject commit b6bf84ed241a74d796a435163019c6a1c5af12af
+Subproject commit cb439dd54878c546a85b1ed1282bca7e340875c0

diff --git a/qtlocation b/qtlocation
index 09868ac..e0c93fc 160000 (submodule)
--- a/qtlocation
+++ b/qtlocation
@@ -1 +1 @@
-Subproject commit 09868ace97177fbeb7198a844113f47065102b1b
+Subproject commit e0c93fc1530f1a325f2ac514fb61e6b9f78872d0

diff --git a/qtwebengine b/qtwebengine
index a4b04e4..6bb3d98 160000 (submodule)
--- a/qtwebengine
+++ b/qtwebengine
@@ -1 +1 @@
-Subproject commit a4b04e4c2613cb600680eea5697b2775a765147b
+Subproject commit 6bb3d98e47d89790049edca796843345b8fd3c8b