Add shim/ext deps to ccenv

ccenv currently includes the core/chaincode/shim
and it's transitive dependencies.  But it also
includes shim/ext/... but does not include the
depoendencies for the ext sub-packages

FAB-15942 #done

Change-Id: I220074625615e78b252da7e0a0c0b19915dcb525
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

scripts/goListFiles.sh

@@ -13,7 +13,7 @@ find_golang_src() {
 list_deps() {
     target=$1
 
-    deps=`go list -f '{{ join .Deps "\n" }}' $target`
+    deps=`go list -f '{{ join .Deps "\n" }}' $target/...`
 
     find_golang_src $GOPATH/src/$target