opensc: fix checksum, switch to github.

srcpkgs/opensc/template

@@ -1,7 +1,7 @@
 # Template file for 'opensc'
 pkgname=opensc
 version=0.15.0
-revision=1
+revision=2
 build_style=gnu-configure
 configure_args="--enable-man  --enable-sm --enable-static=no --enable-doc
  --with-xsl-stylesheetsdir=/usr/share/xsl/docbook"
@@ -12,8 +12,9 @@ maintainer="Juan RP <xtraeme@voidlinux.eu>"
 homepage="https://github.com/OpenSC/OpenSC/wiki"
 license="LGPL-2.1"
 short_desc="Tools and libraries for smart cards"
-distfiles="${SOURCEFORGE_SITE}/${pkgname}/${pkgname}-${version}.tar.gz"
-checksum=7cfa86852f1b200cf5842bbd062ed1762fc63cb3f0155cdab191b74aa8c37b8f
+distfiles="https://github.com/OpenSC/OpenSC/archive/${version}.tar.gz"
+checksum=8f8f8cf52e0252334e4dfdccca829b876a3de6340deb772aa0bfe0c0cc10eaf5
+wrksrc="OpenSC-$version"
 
 pre_configure() {
 	autoreconf -fi