[glib/wip/meson] glib-mkenums: add back missing --fprod option

[Tim-Philipp Müller <tpm src gnome org>]

commit 2aa486b5c932a84691ca099d4c4afab7cd1e2b71
Author: Matej Knopp <matej knopp gmail com>
Date:   Sun May 28 22:29:20 2017 +0200

    glib-mkenums: add back missing --fprod option
    
    ... in glib-mkenums python port.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779332
    https://bugzilla.gnome.org/show_bug.cgi?id=783198

 gobject/glib-mkenums.in |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gobject/glib-mkenums.in b/gobject/glib-mkenums.in
index 651f0e4..147a9ce 100755
--- a/gobject/glib-mkenums.in
+++ b/gobject/glib-mkenums.in
@@ -238,6 +238,8 @@ parser.add_argument('--fhead', default='', dest='fhead',
                     help='Output file header')
 parser.add_argument('--ftail', default='', dest='ftail',
                     help='Per input file production')
+parser.add_argument('--fprod', default='', dest='fprod',
+                    help='Put out TEXT everytime a new input file is being processed.')
 parser.add_argument('--eprod', default='', dest='eprod',
                     help='Per enum text (produced prior to value iterations)')
 parser.add_argument('--vhead', default='', dest='vhead',