$NetBSD$

Remove bogus install(1) option

--- Makefile.in.orig	2021-04-16 20:43:03.000000000 +0000
+++ Makefile.in
@@ -1011,7 +1011,7 @@ xoscope_gtk.o: builtins.h
 
 install-data-local:
 	@$(NORMAL_INSTALL)
-	$(INSTALL_DATA) -D xoscope.png $(DESTDIR)$(datadir)/pixmaps/xoscope.png
+	$(INSTALL_DATA) xoscope.png $(DESTDIR)$(datadir)/pixmaps/xoscope.png
 
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.