patch for Xephyr build

[Cherry G. Mathew <cherry%zyx.in@localhost>]

Hello,

I found that this allows x11/modular-x11-xephyr to get past a previous
pkg-config failure.

I'm not sure if this is the correct fix though.

Many Thanks,
-- 
~cherry

Index: x11/modular-xorg-server/Makefile.common
===================================================================
RCS file: /cvsroot/pkgsrc/x11/modular-xorg-server/Makefile.common,v
retrieving revision 1.14
diff -u -r1.14 Makefile.common
--- x11/modular-xorg-server/Makefile.common     12 Jan 2017 00:26:35
-0000      1.14
+++ x11/modular-xorg-server/Makefile.common     20 Feb 2017 11:49:52
-0000
@@ -134,6 +134,7 @@
 CONFIGURE_ARGS+=       --with-sha1=libnettle
 .endif

+.include "../../graphics/libepoxy/buildlink3.mk"
 .include "../../devel/ncurses/buildlink3.mk"
 .include "../../devel/zlib/buildlink3.mk"
 .include "../../fonts/libfontenc/buildlink3.mk"