Joel Brobecker to be GDB Release Manager

[Stan Shebs <shebs@apple.com>]

The GDB Steering Committee is pleased to announce Joel Brobecker as
the new Release Manager for GDB.

Joel has been a regular contributor to GDB for the past five years or
so, and is especially notable for testing and fixing GDB on many of
our exotic native configurations. He is also a maintainer for AIX and
mips configs.

To recap Joel's new responsibilities:

* The Release Manager is responsible for organizing, scheduling,
 and managing releases of GDB.

* The Release Manager decides the approval and commit policies
 for release branches, and can change them as needed.

Please join me in welcoming Joel to his new role, and of course feel
free to immediately start bugging him about when the next release
will be out. :-)

(I see that the RM is not mentioned in gdb/MAINTAINERS, but it seems
useful to have it there in addition to the appropriate web pages.)

Stan