Small header fixes #3329

Job	Run time
Compile sysdeps (dripos)	2m 26s
Build mlibc (x86_64, mlibc)	3m 29s
Compile sysdeps (lemon)	2m 27s
Build mlibc (x86_64, mlibc-static)	3m 23s
Compile sysdeps (aero)	2m 10s
Build mlibc (x86_64, mlibc-shared)	2m 57s
Compile sysdeps (ironclad)	2m 29s
Build mlibc (x86_64, mlibc-ansi-only)	2m 47s
Compile sysdeps (lyre)	2m 15s
Build mlibc (x86_64, mlibc-headers-only)	2m 4s
Compile sysdeps (keyronex)	2m 16s
Build mlibc (riscv64, mlibc)	3m 45s
Build mlibc (riscv64, mlibc-static)	4m 36s
Build mlibc (riscv64, mlibc-shared)	2m 51s
Build mlibc (riscv64, mlibc-ansi-only)	2m 44s
Build mlibc (riscv64, mlibc-headers-only)	1m 53s
Build mlibc (aarch64, mlibc)	3m 55s
Build mlibc (aarch64, mlibc-static)	3m 22s
Build mlibc (aarch64, mlibc-shared)	3m 3s
Build mlibc (aarch64, mlibc-ansi-only)	2m 55s
Build mlibc (aarch64, mlibc-headers-only)	1m 53s
Build mlibc (x86, mlibc)	3m 38s
Build mlibc (x86, mlibc-static)	3m 1s
Build mlibc (x86, mlibc-shared)	3m 5s
Build mlibc (x86, mlibc-ansi-only)	2m 51s
Build mlibc (x86, mlibc-headers-only)	1m 59s
	1h 14m 14s

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