build

[doc] requirements: Add section encouraging DMABUF use for iGPUs #2517

Job	Run time
docs	1m 1s
client (gcc, g++, xdg-shell, Release)	1m 2s
client (gcc, g++, xdg-shell, Debug)	1m 10s
host-linux	52s
client (gcc, g++, libdecor, Release)	50s
client (gcc, g++, libdecor, Debug)	1m 2s
host-windows-cross	37s
client (clang, clang++, xdg-shell, Release)	1m 18s
client (clang, clang++, xdg-shell, Debug)	58s
host-windows-native	1m 28s
client (clang, clang++, libdecor, Release)	1m 18s
client (clang, clang++, libdecor, Debug)	59s
module	22s
obs (gcc)	36s
obs (clang)	44s
	14m 17s

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