wlroots 0.20.0-rc4

Diego Viola (1):
      treewide: fix typos

Kenny Levinsen (1):
      scene/layer_shell_v1: Add support for exclusive_edge

Simon Ser (7):
      render/vulkan: introduce buffer_import_sync_file()
      render/vulkan: take render pass in vulkan_sync_render_buffer()
      render/vulkan: fix missing DMA-BUF implicit read fence for textures
      render/vulkan: introduce buffer_export_sync_file()
      render/vulkan: add "acquire" to vulkan_sync_foreign_texture()
      render/vulkan: fix missing DMA-BUF implicit write fence for render buffer
      build: bump version to 0.20.0-rc4

Wang Yu (1):
      xwayland: fix memory leak on pipe() failure

YaoBing Xiao (1):
      render/gles: use optimized clears for unblended rects

liupeng (1):
      screencopy: simplify capture error handling