qt: addversion 5.11.2 (#9555)

var/spack/repos/builtin/packages/qt/package.py

@@ -17,6 +17,7 @@ class Qt(Package):
     list_url = 'http://download.qt.io/archive/qt/'
     list_depth = 3
 
+    version('5.11.2', 'c6104b840b6caee596fa9a35bc5f57f67ed5a99d6a36497b6fe66f990a53ca81')
     version('5.10.0', 'c5e275ab0ed7ee61d0f4b82cd471770d')
     version('5.9.1',  '77b4af61c49a09833d4df824c806acaf')
     version('5.9.0',  '9c8bc8b828c2b56721980368266df9d9')