libsdl3: Upgrade 3.4.14 -> 3.4.20

Upgrade to release 3.4.20:

- Fixed mouse wheel direction in mouse relative mode on Windows
- Improved Wayland clipboard handling
- Fixed color cursor alpha mask on X11
- Fixed a crash when Vulkan texture memory binding fails
- Fixed transparent windows using the Vulkan renderer
- Improved handling of Nintendo Switch controller calibration
- Fixed Nintendo Switch controllers failing because of missing
  stick and IMU calibration
- Fixed reports stopping on the Flydigi Vader 5 Pro while the
  Flydigi Space Station service is running
- Added support for rumble and trigger rumble on the Flydigi Vader
  5 Pro
- Added support for the 8BitDo Ultimate 2C Wireless controller via
  HIDAPI
- Fixed a crash recording float audio on Android 10
- Improved relative mouse mode handling on Android
- Fixed window orientation on iOS 27
- Fixed keyboard focus when using the latest Xcode on iOS

Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-graphics/libsdl3/libsdl3/0001-cmake-Pass-_GNU_SOURCE-via-CMAKE_REQUIRED_DEFINITION.patch

@@ -1,4 +1,4 @@
-From c8a74ad998879e52badd09e9e52477c8e87d0e5d Mon Sep 17 00:00:00 2001
+From 6f1bd0a468f5c7b49dd63125aacd8af2dd8fd8da Mon Sep 17 00:00:00 2001
 From: Khem Raj <khem.raj@oss.qualcomm.com>
 Date: Fri, 31 Jul 2026 02:25:45 -0700
 Subject: [PATCH] cmake: Pass _GNU_SOURCE via CMAKE_REQUIRED_DEFINITIONS too
@@ -36,7 +36,7 @@ Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
  1 file changed, 5 insertions(+)
 
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 93a99bc..e37858d 100644
+index f7c1528..4381326 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
 @@ -122,6 +122,11 @@ set(SDL_CHECK_REQUIRED_LINK_OPTIONS "" CACHE STRING "Extra link options (for CMA

meta-oe/recipes-graphics/libsdl3/libsdl3_3.4.20.bb

@@ -20,7 +20,7 @@ SRC_URI = "http://www.libsdl.org/release/SDL3-${PV}.tar.gz \
 
 S = "${UNPACKDIR}/SDL3-${PV}"
 
-SRC_URI[sha256sum] = "30d4aa2b3037718142b32dffd4e72f917ebb6cc5227150e7bb9c45efb2153aeb"
+SRC_URI[sha256sum] = "f3bb06f55bed9557227a700af2ea62e49497ebdf58037732a731a5fb3ef8581f"
 
 inherit cmake lib_package binconfig-disabled pkgconfig upstream-version-is-even