options/linux: set window size in openpty #3173

Job	Run time
Build mlibc (x86_64, mlibc)	15m 37s
Compile sysdeps (dripos)	1m 29s
Build mlibc (x86_64, mlibc-static)	3m 0s
Compile sysdeps (lemon)	1m 32s
Build mlibc (x86_64, mlibc-shared)	2m 53s
Compile sysdeps (aero)	1m 41s
Build mlibc (x86_64, mlibc-ansi-only)	3m 42s
Compile sysdeps (ironclad)	1m 48s
Build mlibc (x86_64, mlibc-headers-only)	1m 29s
Compile sysdeps (lyre)	1m 29s
Build mlibc (riscv64, mlibc)	3m 49s
Build mlibc (riscv64, mlibc-static)	6m 4s
Compile sysdeps (keyronex)	1m 53s
Build mlibc (riscv64, mlibc-shared)	2m 49s
Build mlibc (riscv64, mlibc-ansi-only)	2m 26s
Build mlibc (riscv64, mlibc-headers-only)	1m 48s
Build mlibc (aarch64, mlibc)	5m 11s
Build mlibc (aarch64, mlibc-static)	4m 23s
Build mlibc (aarch64, mlibc-shared)	3m 15s
Build mlibc (aarch64, mlibc-ansi-only)	3m 7s
Build mlibc (aarch64, mlibc-headers-only)	1m 32s
	1h 10m 57s

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