Update git submodules

* Update plugins/download-commands from branch 'master'
  to 48e143ad2dd5b4e4dffaa6646ac826b4e38083ce
  - GitDownloadCommand#getRepoCommand: Add Javadoc to prevent 'unused' warnings
    
    Change-Id: Ib4ab2165755c9889ed01dc57318a63a7fb682b86
    
diff --git a/plugins/download-commands b/plugins/download-commands
index 5c50f9b..48e143a 160000
--- a/plugins/download-commands
+++ b/plugins/download-commands
@@ -1 +1 @@
-Subproject commit 5c50f9b17e616fd84d2c561822161fff46bbf902
+Subproject commit 48e143ad2dd5b4e4dffaa6646ac826b4e38083ce