Report attached gamepads during launch to fix L4D2

Limelight/Stream/StreamConfiguration.h

@@ -20,5 +20,6 @@
 @property int bitRate;
 @property int riKeyId;
 @property NSData* riKey;
+@property int gamepadMask;
 
 @end

Limelight/Stream/StreamConfiguration.m

@@ -9,5 +9,5 @@
 #import "StreamConfiguration.h"
 
 @implementation StreamConfiguration
-@synthesize host, appID, width, height, frameRate, bitRate, riKeyId, riKey;
+@synthesize host, appID, width, height, frameRate, bitRate, riKeyId, riKey, gamepadMask;
 @end

Limelight/Stream/StreamManager.m

@@ -106,7 +106,8 @@
                                           height:_config.height
                                      refreshRate:_config.frameRate
                                            rikey:[Utils bytesToHex:_config.riKey]
-                                         rikeyid:_config.riKeyId]]];
+                                         rikeyid:_config.riKeyId
+                                     gamepadMask:_config.gamepadMask]]];
     NSString *gameSession = [launchResp getStringTag:@"gamesession"];
     if (launchResp == NULL || ![launchResp isStatusOk]) {
         [_callbacks launchFailed:@"Failed to launch app"];