go-ipfs: update to 0.4.20.

srcpkgs/go-ipfs/template

@@ -1,13 +1,13 @@
 # Template file for 'go-ipfs'
 pkgname=go-ipfs
-version=0.4.19
+version=0.4.20
 revision=1
 create_wrksrc=yes
 build_wrksrc="${pkgname}-${version}"
 build_style=go
 go_import_path="github.com/ipfs/${pkgname}"
 go_package="${go_import_path}/cmd/ipfs"
-hostmakedepends="gx-go"
+hostmakedepends="git"
 depends="fs-repo-migrations>=1.3.0"
 short_desc="Global versioned P2P merkle DAG file system"
 maintainer="Christopher Brannon <chris@the-brannons.com>"
@@ -15,15 +15,13 @@ license="MIT"
 homepage="https://ipfs.io"
 changelog="https://github.com/ipfs/go-ipfs/blob/master/CHANGELOG.md"
 distfiles="https://${go_import_path}/archive/v${version}.tar.gz"
-checksum=de0540e6d10aebbef602dc70da39c666952f980ceaccbd4aafb1578301706139
+checksum=ddaeb8b8747efc81b560bb9c3e751c4277b089f3cd113e6001d1392993fb0fd0
 
 pre_build() {
 	# Disable the dynamic plugin loader for now; breaks cross.
 	if [ "$CROSS_BUILD" ]; then
 		rm plugin/loader/load_linux.go
 	fi
-
-	gx install
 }
 
 post_install() {