keyutils meson regression in 8.1.0

Host environment

• Operating system: Arch Linux
• OS/kernel version: 6.4.11
• Architecture: x86_64
• QEMU flavor: qemu-system-x86_64
• QEMU version: 8.1.0

Description of problem

keyutils is no longer found by meson during the build.

commit 0db0fbb5 appears to be buggy:

$ grep KEYUTILS config-host.h
#undef CONFIG_KEYUTILS

Steps to reproduce

1. Have keyutils installed
2. Build QEMU 8.1.0
3. Note that keyutils is no longer linked into the build

Thanks