MAINTAINERS: add overlayfs maintainer

(From OE-Core rev: 8749556d06b07961080650ac17ee1c37666e01fd)

Signed-off-by: Vyacheslav Yurkov <uvv.mail@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

MAINTAINERS.md

@@ -40,6 +40,7 @@ Component/Subsystem Maintainers
 * opkg: Alex Stewart
 * devtool: Saul Wold
 * eSDK: Saul Wold
+* overlayfs: Vyacheslav Yurkov
 
 Maintainers needed
 ------------------