unittests: ignore nix rpaths
unittests: ignore nix rpaths

As a necessity nix adds a bunch of rpaths to files, this is unavoidable
do to the way nix package management works. Meson doesn't expect this
however, and fails all rpath tests. To correct this we just ignore any
rpath entries that start with `/nix`.

QuLogic/meson,pexip/meson,pexip/meson,mesonbuild/meson,jpakkane/meson,mesonbuild/meson,QuLogic/meson,QuLogic/meson,jpakkane/meson,pexip/meson,jpakkane/meson,jpakkane/meson,QuLogic/meson,mesonbuild/meson,pexip/meson,pexip/meson,jpakkane/meson,jpakkane/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,QuLogic/meson,QuLogic/meson,pexip/meson,pexip/meson,QuLogic/meson,mesonbuild/meson,QuLogic/meson,jpakkane/meson,pexip/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson,mesonbuild/meson,jpakkane/meson,mesonbuild/meson,jpakkane/meson