Add OWNERS files for perfprofd and simpleperf.

Bug: N/A
Test: N/A
Change-Id: I04c950bcde5c2001c0dd0cc0acabbdfcc5e21e69
diff --git a/simpleperf/OWNERS b/simpleperf/OWNERS
new file mode 100644
index 0000000..fcd7757
--- /dev/null
+++ b/simpleperf/OWNERS
@@ -0,0 +1 @@
+yabinc@google.com