meson: vhost-user-gpu/virtiofsd: use absolute path
The option `libexecdir` is relative to `prefix` (see
https://mesonbuild.com/Builtin-options.html), so we have to be aware
of this when creating 50-qemu-gpu.json and
50-qemu-virtiofsd.json. Otherwise, tools like libvirt will not be able
to find the executable.
Fixes:
16bf7a3326d8 ("configure: move directory options from config-host.mak to meson")
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Message-Id: <
20201103112333.24734-1-mhartmay@linux.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>