Integrate from //sandbox/mathias/donut/...@145728

SurfaceFlinger rework for new EGL driver model support.
diff --git a/modules/overlay/overlay.cpp b/modules/overlay/overlay.cpp
index 0246b5b..a91df58 100644
--- a/modules/overlay/overlay.cpp
+++ b/modules/overlay/overlay.cpp
@@ -44,7 +44,7 @@
     open: overlay_device_open
 };
 
-const struct overlay_module_t HAL_MODULE_INFO_SYM = {
+struct overlay_module_t HAL_MODULE_INFO_SYM = {
     common: {
         tag: HARDWARE_MODULE_TAG,
         version_major: 1,