Update to 1.16.

Submitted by:	Alastair Hogge
PR:		248683

graphics/libpotrace/Makefile

@@ -1,7 +1,7 @@
 # $FreeBSD$
 
 PORTNAME=	libpotrace
-PORTVERSION=	1.12
+PORTVERSION=	1.16
 CATEGORIES=	graphics
 MASTER_SITES=	SF/potrace/${PORTVERSION}
 DISTNAME=	potrace-${PORTVERSION}
@@ -20,7 +20,7 @@ PLIST_FILES=	include/potracelib.h \
 		lib/libpotrace.a \
 		lib/libpotrace.so \
 		lib/libpotrace.so.0 \
-		lib/libpotrace.so.0.0.2
+		lib/libpotrace.so.0.0.6
 
 OPTIONS_DEFINE=	METRIC A4
 OPTIONS_DEFAULT=METRIC A4

graphics/libpotrace/distinfo

@@ -1,2 +1,3 @@
-SHA256 (potrace-1.12.tar.gz) = b0bbf1d7badbebfcb992280f038936281b47ddbae212e8ae91e863ce0b76173b
-SIZE (potrace-1.12.tar.gz) = 604946
+TIMESTAMP = 1584716910
+SHA256 (potrace-1.16.tar.gz) = be8248a17dedd6ccbaab2fcc45835bb0502d062e40fbded3bc56028ce5eb7acc
+SIZE (potrace-1.16.tar.gz) = 657314

graphics/libpotrace/files/patch-Makefile.in

@@ -1,8 +1,8 @@
---- Makefile.in.orig	2013-02-20 00:49:08 UTC
+--- Makefile.in.orig	2019-09-17 03:12:20 UTC
 +++ Makefile.in
-@@ -259,7 +259,7 @@ top_srcdir = @top_srcdir@
- # unsure why automake/autoconf does not automatically distribute libtool
- EXTRA_DIST = README-WIN libtool
+@@ -335,7 +335,7 @@ top_builddir = @top_builddir@
+ top_srcdir = @top_srcdir@
+ EXTRA_DIST = README-WIN
  ACLOCAL_AMFLAGS = -I m4
 -SUBDIRS = src doc check
 +SUBDIRS = src

graphics/libpotrace/files/patch-src-Makefile.in

@@ -1,6 +1,6 @@
---- src/Makefile.in.orig	2013-02-20 00:49:08 UTC
+--- src/Makefile.in.orig	2019-09-17 03:12:20 UTC
 +++ src/Makefile.in
-@@ -664,7 +664,7 @@ install-dvi: install-dvi-am
+@@ -808,7 +808,7 @@ install-dvi: install-dvi-am
  
  install-dvi-am: