prepare 3.4.3 release

extra/CHANGES.txt

@@ -1,7 +1,9 @@
-xxxx-xx-xx: 3.4.3
+2017-09-10: 3.4.3
 
 	Bugfixes:
 
+	all : fix DCE issue with interface fields (#6502)
+	cpp : fix return typing for embedded closures (#6121)
 	php7: fix `@:enum abstract` generation  without `-dce full` (#6175)
 	php7: fix using enum constructor with arguments as a call argument (#6177)
 	php7: fix accessing methods on dynamic values (#6211)

src/globals.ml

@@ -20,7 +20,7 @@ type platform =
 	| Python
 	| Hl
 
-let version = 3402
+let version = 3403
 let version_major = version / 1000
 let version_minor = (version mod 1000) / 100
 let version_revision = (version mod 100)