fix typo in package file

NT7S · NT7S · commit 18be56ef653c · 2017-01-04T10:04:12.000-08:00
diff --git a/arduino/package_etherkit_index.json b/arduino/package_etherkit_index.json
@@ -55,6 +55,7 @@
         }
       ],
       "tools": [
+			{
 				"name": "bossac",
 				"version": "1.7.0-etherkit-1",
 				"systems": [
