fonts: Fix a copy/paste bug preventing correct generation of the
System font for codepages 1256 and 1257.

fonts/Makefile.in

diff --git a/fonts/Makefile.in b/fonts/Makefile.in
index ef9ab8c..68ddf1d 100644
--- a/fonts/Makefile.in
+++ b/fonts/Makefile.in
@@ -334,10 +334,10 @@
 	$(FNT2FON) system-1255-96-16.fnt $@
 
 vgas1256.fon: system-1256-96-16.fnt $(FNT2FON)
-	$(FNT2FON) system-1255-96-16.fnt $@
+	$(FNT2FON) system-1256-96-16.fnt $@
 
 vgas1257.fon: system-1257-96-16.fnt $(FNT2FON)
-	$(FNT2FON) system-1255-96-16.fnt $@
+	$(FNT2FON) system-1257-96-16.fnt $@
 
 vgas874.fon: system-874-96-16.fnt $(FNT2FON)
 	$(FNT2FON) system-874-96-16.fnt $@