l/appstream-glib: Fix build with gobject-introspection.

l/appstream-glib/appstream-glib.SlackBuild

@@ -80,8 +80,12 @@ meson .. \
   --libdir /usr/lib$LIBDIRSUFFIX \
   --mandir /usr/man \
   --strip \
-  -D stemmer=false \
-  -D introspection=false
+  -D stemmer=false
+
+# Workaround for a Meson bug with gobject-introspection < 1.54
+# <https://github.com/ximion/appstream/issues/146>.
+sed -i "/^ COMMAND = \\/usr\\/bin\\/g-ir-scanner/s,-lyaml ,," build.ninja
+
 ninja -j $JOBS
 DESTDIR=$PKG ninja install