Add OWNERS in system/libufdt

Owners are selected from top CL approvals or owners.
They will be suggested to review/approve future CLs.

Test: build/make/tools/checkowners.py -c -v OWNERS
Change-Id: I24f3d85ab3360c713e0bf586c410331bfe30b614
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..f512bb3
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,2 @@
+bowgotsai@google.com
+szuweilin@google.com