libtorrent: fix wrong version in configure.ac

srcpkgs/libtorrent/template

@@ -1,7 +1,7 @@
 # Template build file for 'libtorrent'
 pkgname=libtorrent
 version=0.13.5
-revision=1
+revision=2
 build_style=gnu-configure
 configure_args="--enable-static --disable-debug --without-kqueue
  --enable-aligned --with-posix-fallocate"
@@ -15,6 +15,8 @@ distfiles="https://github.com/rakshasa/${pkgname}/archive/${version}.tar.gz>${pk
 checksum=625a13397828c2b84e17f51200ebee8b4f754c112dbb9c0f31292507fd7c026e
 
 pre_configure() {
+	# Fix wrong version in configure.ac
+	sed 's,0.13.4,0.13.5,' -i configure.ac
 	# Drop cppunit requirement
 	sed '/AM_PATH_CPPUNIT.*/d' -i configure.ac
 	autoreconf -fi