get.sh: don't frivolously copy tmp git clones

this fixes a regression in a previous patch, this time
also taking account for the different cache locations.

all of get.sh needs to be purged, and re-written clean.
it looks clean. but it's years of hacks.

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/get.sh

@@ -53,9 +53,11 @@ fetch_project()
 
 clone_project()
 {
-	# if loc is blank, don't create a target
-	# directory; just update the caches
-	loc=""
+	loc="$XBMK_CACHE/clone/${url#*://}"
+	if [ "$XBMK_CACHE_MIRROR" = "y" ]; then
+		loc="$XBMK_CACHE/mirror/${url#*://}"
+	fi
+
 	if singletree "$project"; then
 		loc="src/$project"
 	fi