Update to stockfish-10. Had stockfish play a game against itself on scud as

a test.
Changelog:
https://github.com/official-stockfish/Stockfish/compare/sf_9...sf_10

games/stockfish/Makefile

@@ -1,12 +1,11 @@
-# $OpenBSD: Makefile,v 1.4 2018/10/24 14:28:04 sthen Exp $
+# $OpenBSD: Makefile,v 1.5 2018/11/30 19:54:29 bcallah Exp $
 
-V =		9
+V =		10
 COMMENT =	open source chess engine
 DISTNAME =	stockfish-${V}-src
 PKGNAME =	stockfish-${V}
 EXTRACT_SUFX =	.zip
 CATEGORIES =	games
-REVISION =	0
 
 HOMEPAGE =	https://stockfishchess.org/
 MAINTAINER =	Brian Callahan <bcallah@openbsd.org>

games/stockfish/distinfo

@@ -1,2 +1,2 @@
-SHA256 (stockfish-9-src.zip) = ui5y1pc0ecjIOcf0oJXRIYKevo3zm3Hr8pHITlyz424=
-SIZE (stockfish-9-src.zip) = 171925
+SHA256 (stockfish-10-src.zip) = Kb0B50BwmKqehRuC9upL8rRtJukHWkiiacseQMWCoHM=
+SIZE (stockfish-10-src.zip) = 174377

games/stockfish/patches/patch-Makefile

@@ -1,12 +1,12 @@
-$OpenBSD: patch-Makefile,v 1.1 2018/02/04 22:03:36 bcallah Exp $
+$OpenBSD: patch-Makefile,v 1.2 2018/11/30 19:54:29 bcallah Exp $
 
 Don't hardcode PREFIX, CC, or CXX.
 
 Index: Makefile
 --- Makefile.orig
 +++ Makefile
-@@ -31,7 +31,7 @@ endif
- EXE = stockfish
+@@ -29,7 +29,7 @@ EXE = stockfish
+ endif
  
  ### Installation dir definitions
 -PREFIX = /usr/local
@@ -14,7 +14,7 @@ Index: Makefile
  BINDIR = $(PREFIX)/bin
  
  ### Built-in benchmark for pgo-builds
-@@ -150,8 +150,8 @@ ifeq ($(COMP),)
+@@ -154,8 +154,8 @@ ifeq ($(COMP),)
  endif
  
  ifeq ($(COMP),gcc)