docs/relnotes: Add EXT_demote_to_helper_invocation support on iris, i965

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
40 jobs for !2072 with r/glsl-demote in 72 minutes and 52 seconds (queued for 6 seconds)
latest detached
Status Job ID Name Coverage
  Containers
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debian-10

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debian-9

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aarch64
test-container:arm64

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  Build
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meson-arm64

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meson-armhf

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meson-clang

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meson-clover

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meson-clover-old-llvm

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meson-i386

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meson-main

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meson-swr-glvnd

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meson-vulkan

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scons

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scons-old-llvm

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scons-swr

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scons-win64

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  Test
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db410c
arm64_a306_gles2 1/4

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db410c
arm64_a306_gles2 2/4

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db410c
arm64_a306_gles2 3/4

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db410c
arm64_a306_gles2 4/4

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mesa-cheza
arm64_a630_gles2

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mesa-cheza
arm64_a630_gles31 1/4

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mesa-cheza
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mesa-cheza
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mesa-cheza
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mesa-cheza
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mesa-cheza
arm64_a630_gles3 2/6

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mesa-cheza
arm64_a630_gles3 3/6

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mesa-cheza
arm64_a630_gles3 4/6

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mesa-cheza
arm64_a630_gles3 5/6

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mesa-cheza
arm64_a630_gles3 6/6

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test-llvmpipe-gles2 1/4

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test-llvmpipe-gles2 2/4

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test-llvmpipe-gles2 3/4

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test-llvmpipe-gles2 4/4

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test-softpipe-gles2 1/4

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test-softpipe-gles2 2/4

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test-softpipe-gles2 3/4

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test-softpipe-gles2 4/4

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test-softpipe-gles3-limited

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