Log Message:
SDL2: updated to 2.0.9

2.0.9:

General:
* Added a new sensor API, initialized by passing SDL_INIT_SENSOR to SDL_Init(), \ 
and defined in SDL_sensor.h
* Added an event SDL_SENSORUPDATE which is sent when a sensor is updated
* Added SDL_GetDisplayOrientation() to return the current display orientation
* Added an event SDL_DISPLAYEVENT which is sent when the display orientation changes
* Added HIDAPI joystick drivers for more consistent support for Xbox, PS4 and \ 
Nintendo Switch Pro controller support across platforms. (Thanks to Valve for \ 
contributing the PS4 and Nintendo Switch Pro controller support)
* Added support for many other popular game controllers
* Added SDL_JoystickGetDevicePlayerIndex(), SDL_JoystickGetPlayerIndex(), and \ 
SDL_GameControllerGetPlayerIndex() to get the player index for a controller. For \ 
XInput controllers this returns the XInput index for the controller.
* Added SDL_GameControllerRumble() and SDL_JoystickRumble() which allow simple \ 
rumble without using the haptics API
* Added SDL_GameControllerMappingForDeviceIndex() to get the mapping for a \ 
controller before it's opened
* Added the hint SDL_HINT_MOUSE_DOUBLE_CLICK_TIME to control the mouse \ 
double-click time
* Added the hint SDL_HINT_MOUSE_DOUBLE_CLICK_RADIUS to control the mouse \ 
double-click radius, in pixels
* Added SDL_HasColorKey() to return whether a surface has a colorkey active
* Added SDL_HasAVX512F() to return whether the CPU has AVX-512F features
* Added SDL_IsTablet() to return whether the application is running on a tablet
* Added SDL_THREAD_PRIORITY_TIME_CRITICAL for threads that must run at the \ 
highest priority

Mac OS X:
* Fixed black screen at start on Mac OS X Mojave

Linux:
* Added SDL_LinuxSetThreadPriority() to allow adjusting the thread priority of \ 
native threads using RealtimeKit if available.

iOS:
* Fixed Asian IME input

Android:
* Updated required Android SDK to API 26, to match Google's new App Store \ 
requirements
* Added support for wired USB Xbox, PS4, and Nintendo Switch Pro controllers
* Added support for relative mouse mode on Android 7.0 and newer (except where \ 
it's broken, on Chromebooks and when in DeX mode with Samsung Experience 9.0)
* Added support for custom mouse cursors on Android 7.0 and newer
* Added the hint SDL_HINT_ANDROID_TRAP_BACK_BUTTON to control whether the back \ 
button will back out of the app (the default) or be passed to the application as \ 
SDL_SCANCODE_AC_BACK
* Added SDL_AndroidBackButton() to trigger the Android system back button \ 
behavior when handling the back button in the application
* Added SDL_IsChromebook() to return whether the app is running in the \ 
Chromebook Android runtime
* Added SDL_IsDeXMode() to return whether the app is running while docked in the \ 
Samsung DeX