potrace: Update from 1.15 to 1.16

packages/potrace/build.sh

@@ -1,9 +1,8 @@
 TERMUX_PKG_HOMEPAGE=http://potrace.sourceforge.net
 TERMUX_PKG_DESCRIPTION="Tool for transforming a bitmap into a smooth, scalable image"
 TERMUX_PKG_LICENSE="GPL-2.0"
-TERMUX_PKG_VERSION=1.15
-TERMUX_PKG_REVISION=1
-TERMUX_PKG_SHA256=a9b33904ace328340c850a01458199e0064e03ccaaa731bc869a842b1b8d529d
+TERMUX_PKG_VERSION=1.16
+TERMUX_PKG_SHA256=be8248a17dedd6ccbaab2fcc45835bb0502d062e40fbded3bc56028ce5eb7acc
 # TERMUX_PKG_SRCURL=http://potrace.sourceforge.net/download/$TERMUX_PKG_VERSION/potrace-$TERMUX_PKG_VERSION.tar.gz
 # 2018-02-15: Switching to alternative url as above url is down:
 TERMUX_PKG_SRCURL=https://distfiles.macports.org/potrace/potrace-$TERMUX_PKG_VERSION.tar.gz