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winsys: check for KHR_swap_buffers_with_damage

Christian Hergert requested to merge wip/chergert/KHR_swap_buffers_with_damage into main

Previously, we would only check for EXT_swap_buffers_with_damage which generally will find an implementation. However, some EGL implementations do not appear to support that naming of the extension, preferring to only advertise KHR_swap_buffers_with_damage.

Wayland platform:
EGL API version: 1.5
EGL vendor string: NVIDIA
EGL version string: 1.5
EGL client APIs: OpenGL_ES OpenGL
EGL extensions string:
    EGL_EXT_buffer_age EGL_EXT_client_sync
    EGL_EXT_create_context_robustness EGL_EXT_image_dma_buf_import
    EGL_EXT_image_dma_buf_import_modifiers EGL_MESA_image_dma_buf_export
    EGL_EXT_output_base EGL_EXT_output_drm EGL_EXT_protected_content
    EGL_EXT_stream_consumer_egloutput EGL_EXT_stream_acquire_mode
    EGL_EXT_sync_reuse EGL_IMG_context_priority EGL_KHR_config_attribs
    EGL_KHR_create_context_no_error EGL_KHR_context_flush_control
    EGL_KHR_create_context EGL_KHR_fence_sync
    EGL_KHR_get_all_proc_addresses EGL_KHR_partial_update
    EGL_KHR_swap_buffers_with_damage EGL_KHR_no_config_context
    EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image
    EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image
    EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base
    EGL_KHR_reusable_sync EGL_KHR_stream EGL_KHR_stream_attrib
    EGL_KHR_stream_consumer_gltexture EGL_KHR_stream_cross_process_fd
    EGL_KHR_stream_fifo EGL_KHR_stream_producer_eglsurface
    EGL_KHR_surfaceless_context EGL_KHR_wait_sync EGL_NV_nvrm_fence_sync
    EGL_NV_quadruple_buffer EGL_NV_stream_consumer_eglimage
    EGL_NV_stream_cross_display EGL_NV_stream_cross_object
    EGL_NV_stream_cross_process EGL_NV_stream_cross_system
    EGL_NV_stream_dma EGL_NV_stream_flush EGL_NV_stream_metadata
    EGL_NV_stream_remote EGL_NV_stream_reset EGL_NV_stream_socket
    EGL_NV_stream_socket_inet EGL_NV_stream_socket_unix
    EGL_NV_stream_sync EGL_NV_stream_fifo_next
    EGL_NV_stream_fifo_synchronous EGL_NV_stream_consumer_gltexture_yuv
    EGL_NV_stream_attrib EGL_NV_stream_origin EGL_NV_system_time
    EGL_NV_output_drm_flip_event EGL_NV_triple_buffer
    EGL_NV_robustness_video_memory_purge EGL_WL_bind_wayland_display
    EGL_WL_wayland_eglstream

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