Add OWNERS in external/sqlite

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: Ib2ad32e3594bc3c5b7dba6113b68e978c6b655bc
Signed-off-by: Alex Naidis <alex.naidis@linux.com>
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..7dca068
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,3 @@
+nnk@google.com
+omakoto@google.com
+fkupolov@google.com