Add myself to libcore OWNERS.
Test: N/A, just modifying OWNERS.

Change-Id: I586fc01ea55c056778de96fd920aec17d7227010
diff --git a/OWNERS b/OWNERS
index 60cd2d8..2f5b841 100644
--- a/OWNERS
+++ b/OWNERS
@@ -5,6 +5,7 @@
 
 # People who can approve changes for submission; don't send review emails to them
 # unless you know what you're doing.
+miguelaranda@google.com
 mingaleev@google.com
 nfuller@google.com
 nikitai@google.com