.gitignore: ignore subdirectories

Change-Id: Id5631a813674afabac578b307ebd157a51395079
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
diff --git a/.gitignore b/.gitignore
index e69de29..05735cf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/private/
+/proprietary/
+/security/