contrib: regenerate the meson contrib file to use local pathes with the tools

When using prebuilt contribs the native tools need to be rebuilt locally.
But the contrib.ini that is in the prebuilt tarball doesn't reflect the local pathes
for the native tools.

We can regenerate the contrib.ini files which will use the proper pathes
for these tools and the local contrib pathes for its constants.

Fixes #28896

contrib/src/meson-machinefile/rules.mak

@@ -6,6 +6,8 @@
 # respectively.
 
 PKGS += meson-machinefile
+# regenerate the meson contrib file to use local pathes with the tools
+PKGS_TOOLS += meson-machinefile
 
 ifdef HAVE_CROSS_COMPILE
 CROSS_OR_NATIVE := cross