Adding DirectoryType and editing PIPER's tag in metadata.proto

Test: Treehugger
Change-Id: I7a982ad766bbf8b0474920b524b529b902f47fa5
diff --git a/metadata.proto b/metadata.proto
index ec12d33..7e979b8 100644
--- a/metadata.proto
+++ b/metadata.proto
@@ -41,6 +41,10 @@
   UNENCUMBERED = 7;
 }
 
+enum DirectoryType {
+  PACKAGE = 1;
+}
+
 message ThirdPartyMetaData {
   repeated URL url = 1;
   optional string version = 2;
@@ -48,6 +52,7 @@
   optional string license_note = 5;
   optional Security security = 7;
   optional Date last_upgrade_date = 10;
+  optional DirectoryType type = 11 [default = PACKAGE];
 }
 
 message URL {
@@ -56,7 +61,7 @@
     HOMEPAGE = 1;
     ARCHIVE = 2;
     GIT = 3;
-    PIPER = 5;
+    PIPER = 4;
     SVN = 7;
     HG = 8;
     DARCS = 9;