gdb: add Nils-Christian Kempke to gdb/MAINTAINERS

Signed-off-by: Nils-Christian Kempke <nils-christian.kempke@intel.com>
diff --git a/gdb/MAINTAINERS b/gdb/MAINTAINERS
index 9bcc11d..225c4b2 100644
--- a/gdb/MAINTAINERS
+++ b/gdb/MAINTAINERS
@@ -558,6 +558,7 @@
 Jeff Johnston					jjohnstn@redhat.com
 Ruslan Kabatsayev				b7.10110111@gmail.com
 Geoff Keating					geoffk@redhat.com
+Nils-Christian Kempke				nils-christian.kempke@intel.com
 Mark Kettenis					kettenis@gnu.org
 Marc Khouzam					marc.khouzam@ericsson.com
 Toshihito Kikuchi				k.toshihito@yahoo.de