Fixed the name from opanal to openal so that haxelib can actually find the lib. (#70)

libs/openal/haxelib.json

@@ -1,5 +1,5 @@
 {
-	"name" : "hlopanal",
+	"name" : "hlopenal",
 	"url" : "https://github.com/HaxeFoundation/hl/tree/master/libs/openal",
 	"license" : "BSD",
 	"contributors" : ["ncannasse"],