MAINTAINERS: add Josh Poimboeuf as faddr2line maintainer

... so I finally get credit for my greatest accomplishment.

And, less importantly, so get_maintainer.pl will actually CC me on
future patches.
Signed-off-by: NJosh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -5413,6 +5413,11 @@ S:	Maintained
 F:	Documentation/hwmon/f71805f
 F:	drivers/hwmon/f71805f.c
 
+FADDR2LINE
+M:	Josh Poimboeuf <jpoimboe@redhat.com>
+S:	Maintained
+F:	scripts/faddr2line
+
 FANOTIFY
 M:	Jan Kara <jack@suse.cz>
 R:	Amir Goldstein <amir73il@gmail.com>