package/go/go-src: share download directory with go

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/go/go-src/go-src.mk

@@ -6,6 +6,7 @@
 
 GO_SRC_SITE = https://storage.googleapis.com/golang
 GO_SRC_SOURCE = go$(GO_VERSION).src.tar.gz
+GO_SRC_DL_SUBDIR = go
 
 GO_SRC_LICENSE = BSD-3-Clause
 GO_SRC_LICENSE_FILES = LICENSE