[gdb] Add me to write-after-approval section in MAINTAINERS

[gdb] Add me to write-after-approval section in MAINTAINERS

I've committed one patch modifying gdb ([gdb/cli] Honour 'print pretty' when
printing result of finish command) and I'm covered by the Novell blanket
copyright assignment.  So AFAIU, I qualify for write-after-approval.

This patch adds me to the MAINTAINERS file in the write-after-approval section.

2018-06-15  Tom de Vries  <tdevries@suse.de>

	* MAINTAINERS (Write After Approval): Add Tom de Vries.