[meson] replace deprecated meson.build_root() use #6
pr.yml
on: push
Linux-ubuntu-gcc
33s
Linux-ubuntu-clang
32s
macOS
42s
DragonflyBSD
3m 14s
FreeBSD
4m 20s
NetBSD
2m 45s
OpenBSD
3m 10s
Linux-alpine-x86_64
2m 27s
Matrix: Linux-alpine
Matrix: Windows-MSYS2
Matrix: Windows-VisualStudio