[UPDATE] devel/libspectrum to 1.4.0

Hi ports@,

Here is a diff to update libspectrum to 1.4.0.

Functions were added to the library, so bumping library minor number.

Comments? OK?

Index: Makefile
===================================================================
RCS file: /cvs/ports/devel/libspectrum/Makefile,v
retrieving revision 1.31
diff -u -p -r1.31 Makefile
--- Makefile 2 Aug 2017 04:50:29 -0000 1.31
+++ Makefile 12 Sep 2017 13:50:34 -0000
@@ -1,8 +1,8 @@
# $OpenBSD: Makefile,v 1.31 2017/08/02 04:50:29 benoit Exp $

COMMENT = ZX Spectrum emulator file format library
-DISTNAME = libspectrum-1.3.6
-SHARED_LIBS = spectrum 8.1 # 14.9
+DISTNAME = libspectrum-1.4.0
+SHARED_LIBS = spectrum 8.2 # 15.10
CATEGORIES = devel

HOMEPAGE = http://fuse-emulator.sourceforge.net/libspectrum.php
Index: distinfo
===================================================================
RCS file: /cvs/ports/devel/libspectrum/distinfo,v
retrieving revision 1.16
diff -u -p -r1.16 distinfo
--- distinfo 2 Aug 2017 04:50:29 -0000 1.16
+++ distinfo 12 Sep 2017 13:50:34 -0000
@@ -1,2 +1,2 @@
-SHA256 (libspectrum-1.3.6.tar.gz) = MchdhbwXrL90ZffXgF/ITfxIMM7jcVuSnURAqqy270c=
-SIZE (libspectrum-1.3.6.tar.gz) = 503554
+SHA256 (libspectrum-1.4.0.tar.gz) = YgfWDiWfrCwgdLIUn/ZJFNZWtlj7AC0AKivjC/DmGF8=
+SIZE (libspectrum-1.4.0.tar.gz) = 514972