README.md: Initialize lfs (Large File Storage)

Change-Id: Ie7cc64b5430e89c6e51d86ec4171a67c8c236f15
diff --git a/README.md b/README.md
index 4e68393..241e3b9 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@
 
 To initialize your local repository using the OmniROM trees, use a command like this:
 
-    repo init -u https://github.com/omnirom/android.git -b android-14.0
+    repo init -u https://github.com/omnirom/android.git -b android-14.0 --git-lfs
 
 Then to sync up: