fix link with lld

math/grpn/patches/patch-Makefile

@@ -1,10 +1,12 @@
-$OpenBSD: patch-Makefile,v 1.5 2010/03/23 20:38:20 jasper Exp $
+$OpenBSD: patch-Makefile,v 1.6 2017/11/03 13:52:15 espie Exp $
 
 - Honor cflags
 - Port to gtk+2
+- don't remove -lm
 
---- Makefile.orig	Fri Apr  5 05:56:05 2002
-+++ Makefile	Tue Mar 23 21:27:40 2010
+Index: Makefile
+--- Makefile.orig
++++ Makefile
 @@ -19,11 +19,9 @@ GTK_DIR =
  #
  # add -DUSE_GNOME if you want to make grpn GNOME compliant.
@@ -24,7 +26,7 @@ $OpenBSD: patch-Makefile,v 1.5 2010/03/23 20:38:20 jasper Exp $
  
  
 -LIBS   = `$(GTK_DIR)gtk-config --libs` -lX11 -lm 
-+LIBS   = `pkg-config --libs gtk+-2.0`
++LIBS   = `pkg-config --libs gtk+-2.0` -lm
  
  
  grpn:	$(OBJS)