DEVELOPERS: update email address for Gary Bisson

Signed-off-by: Gary Bisson <bisson.gary@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 74693e09ae6dc5954839a431b4779dcefaf37a6d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -711,7 +711,7 @@ F:	package/qt5/qt5virtualkeyboard/
 F:	package/qt5/qt5webengine/
 F:	package/qt5/qt5webkit-examples/
 
-N:	Gary Bisson <gary.bisson@boundarydevices.com>
+N:	Gary Bisson <bisson.gary@gmail.com>
 F:	board/boundarydevices/
 F:	configs/nitrogen*
 F:	package/freescale-imx/