Disable SDL sensor support on Windows. (#2655)

It wasn't building cleanly with our existing Bazel overlay files and MSVC.

Fixes https://github.com/google/iree/issues/2456

build_tools/third_party/sdl2/SDL_config_windows.h

diff --git a/build_tools/third_party/sdl2/SDL_config_windows.h b/build_tools/third_party/sdl2/SDL_config_windows.h
index 460fb3b..7626de6 100644
--- a/build_tools/third_party/sdl2/SDL_config_windows.h
+++ b/build_tools/third_party/sdl2/SDL_config_windows.h
@@ -227,6 +227,9 @@
 /* Enable filesystem support */
 #define SDL_FILESYSTEM_WINDOWS 1
 
+/* Disable sensor support */
+#define SDL_SENSOR_DISABLED 1
+
 /* Enable assembly routines (Win64 doesn't have inline asm) */
 #ifndef _WIN64
 #define SDL_ASSEMBLY_ROUTINES 1