patch: add fpm_model

Author: henilp105

src/fpm/git.f90

@@ -448,7 +448,12 @@ subroutine git_archive(source, destination, ref, verbose, error)
       call fatal_error(error, "Cannot find a suitable archive format for 'git archive'."); return
     end if
 
-    call run('git archive '//ref//' --format='//archive_format//' -o '//destination, echo=verbose, exitstat=stat)
+    call run('git archive '//ref//' &
+        --format='//archive_format//' &
+        --add-file=fpm_model.json \
+        -o '//destination, \
+        echo=verbose, \
+        exitstat=stat)
     if (stat /= 0) then
       call fatal_error(error, "Error packing '"//source//"'."); return
     end if