[gnumeric] install: use -D for gi overrides

[Morten Welinder <mortenw src gnome org>]

commit fdb43346579e9db9122609b1b390d59a94ecd782
Author: Morten Welinder <terra gnome org>
Date:   Mon Apr 30 10:19:32 2018 -0400

    install: use -D for gi overrides
    
    This is mostly for distcheck.  Under normal circumstances the directory
    really ought to be there.

 introspection/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/introspection/Makefile.am b/introspection/Makefile.am
index 5109f6f..284bf3b 100644
--- a/introspection/Makefile.am
+++ b/introspection/Makefile.am
@@ -5,7 +5,7 @@ EXTRA_DIST = README                     \
 if HAVE_INTROSPECTION
 if HAVE_PYTHON_GI
 install-data-local:
-       install -m 0444 -t @GIOVERRIDESDIR@ gi/overrides/Gnm.py
+       install -D -m 0444 -t @GIOVERRIDESDIR@ gi/overrides/Gnm.py
 
 uninstall-local:
        rm -f @GIOVERRIDESDIR@/Gnm.py