Adding arch flag to enable building amd64 and 386 packages

- Bumping syncthing version to latest

SPECS/syncthing.spec

@@ -1,28 +1,30 @@
 Name:		syncthing
-Version:	0.12.18
+Version:	0.13.1
 Release:	0%{?dist}
 Summary:	Open, trustworthy and decentralized sync
+# Set to amd64 or 386
+%define arch	amd64
 
 Group:		Applications/System
 License:	MPLv2
 URL:		https://github.com/syncthing/syncthing
-Source0:	https://github.com/syncthing/syncthing/releases/download/v0.12.17/syncthing-linux-386-v%{version}.tar.gz
+Source0:	https://github.com/syncthing/syncthing/releases/download/v${version}/syncthing-linux-%{arch}-v%{version}.tar.gz
 
 Requires:	policycoreutils-python
 
 %description
-Syncthing replaces proprietary sync and cloud services with something open, 
-trustworthy and decentralized. Your data is your data alone and you deserve 
+Syncthing replaces proprietary sync and cloud services with something open,
+trustworthy and decentralized. Your data is your data alone and you deserve
 to choose where it is stored, if it is shared with some third party and how
 it's transmitted over the Internet.
 
 %prep
 tar -zxf %{SOURCE0}
-cd syncthing-linux-386-v%{version}/
+cd syncthing-linux-%{arch}-v%{version}/
 
 %install
 mkdir -p %{buildroot}/usr/bin/
-cd syncthing-linux-386-v%{version}/
+cd syncthing-linux-%{arch}-v%{version}/
 cp syncthing %{buildroot}/usr/bin/
 
 mkdir -p %{buildroot}/etc/systemd/system/