Fix pkgconfig deprecation warning in cross file

Author: robbert-vdh

cross-wine.conf

@@ -4,7 +4,7 @@ cpp = 'wineg++'
 ar = 'ar'
 strip = 'strip'
 # Needs to be specified explicitely for Fedora 32
-pkgconfig = 'pkg-config'
+pkg-config = 'pkg-config'
 # Useful for packaging so Meson can resolve dependencies without a pkg-config
 # file from the repositories
 cmake = 'cmake'