Update revisions.txt

Author: Federico Fissore

build/shared/revisions.txt

@@ -24,6 +24,11 @@ ARDUINO 1.6.6
 * Bridge: YunClient.connected() returns true if there are bytes available for read. Thanks @RobAtticus
 * Bridge: YunClient.stop() now empties all buffers. Thanks @RobAtticus
 
+ARDUINO 1.6.5-r4 - 2015.08.27
+
+[ide]
+* Added support to Genuino boards
+
 ARDUINO 1.6.5-r3 - 2015.07.20
 
 [ide]