Update OWNERS for external/gemmlowp. am: 6bb8a0b5c3

Original change: https://android-review.googlesource.com/c/platform/external/gemmlowp/+/1944922

Change-Id: I9da3167c7670cccb5e1c2f29a5f35ff990513816
diff --git a/OWNERS b/OWNERS
index e05da8e..e5412e2 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1 +1,2 @@
 miaowang@google.com
+ianhua@google.com