syncthing: disable cgo to fix cross compiling

srcpkgs/syncthing/template

@@ -1,7 +1,7 @@
 # Template file for 'syncthing'
 pkgname=syncthing
 version=0.10.13
-revision=2
+revision=3
 hostmakedepends="go>=1.3"
 if [ "$CROSS_BUILD" ]; then
 	hostmakedepends+=" go-cross-linux"
@@ -22,11 +22,12 @@ do_build() {
 	esac
 
 	export GOPATH="${PWD}/gopath"
+	export CGO_ENABLED=0
 	mkdir -p $GOPATH/src/github.com/syncthing
 	ln -s $PWD $GOPATH/src/github.com/syncthing/${pkgname}
 
 	mkdir tmp
-	TMPDIR=${PWD}/tmp/ go run build.go -goos linux -goarch ${goarch} -no-upgrade
+	TMPDIR=${PWD}/tmp/ go run build.go -goos linux -goarch ${goarch} -no-upgrade -version "v${version}"
 	rm -rf tmp
 }