setup: Add the missing quotes

Fixes: d70e7e81bfd44553f425f (setup: Use config name instead layer name)
Change-Id: Iee4a49f31bfbe137532f9be30277857d408cf7d5
Signed-off-by: Alexander Filippov <a.filippov@yadro.com>
diff --git a/setup b/setup
index 09329cd..fb06ba6 100755
--- a/setup
+++ b/setup
@@ -38,7 +38,7 @@
 						oe-init-build-env ${build_dir}
 
 				if [ "$(cat conf/templateconf.cfg)" = "${tmpl}" ]; then
-					sed "s/^\(MACHINE\s*[?:]*\s*=\s*\).*$/\1${target}/" \
+					sed "s/^\(MACHINE\s*[?:]*\s*=\s*\).*$/\1\"${target}\"/" \
 						-i conf/local.conf
 				fi
 				return