meson: use subproject for keycodemapdb

By using a subproject, our own meson.build can use variables from
the subproject instead of hard-coded paths.  This is also the first step
towards managing downloads with .wrap files instead of submodule.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 0 deletions

diff --git a/subprojects/keycodemapdb b/subprojects/keycodemapdb
new file mode 160000
+Subproject f5772a62ec52591ff6870b7e8ef32482371f22c