dev-db/rqlite: filter GOCACHE vars (bug 678966)

Reported-by: Toralf Förster <toralf@gentoo.org>
Closes: https://bugs.gentoo.org/678966
Package-Manager: Portage-2.3.62, Repoman-2.3.12
Signed-off-by: Zac Medico <zmedico@gentoo.org>

dev-db/rqlite/rqlite-4.4.0.ebuild

@@ -37,6 +37,7 @@ SRC_URI="https://${EGO_PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz
 S="${WORKDIR}/${P}/src/${EGO_PN}"
 
 src_compile() {
+	export -n GOCACHE XDG_CACHE_HOME #678966
 	GOPATH="${WORKDIR}/${P}" \
 	GOBIN="${WORKDIR}/${P}/bin" \
 		go install \