Fix dependency version specification

Mathematical range syntax was introduced with
31c53f094c, but unforutantely brackets
and parentheses where reversed.

smack-resolver-dnsjava/build.gradle

@@ -5,5 +5,5 @@ javax.naming API (e.g. Android)."""
 
 dependencies {
 	compile project(path: ':smack-core')
-	compile 'dnsjava:dnsjava:(2.1,2.2]'
+	compile 'dnsjava:dnsjava:[2.1,2.2)'
 }