[QtQuickCompiler] .qtquickcompiler directory isn't deleted when doing 'make distclean'

Steps to reproduce:

• run 'qmake CONFIG+=qtquickcompiler' to e.g. demos/samegame
• build the example
• run 'make distclean'
• check with 'ls -la' the contents of the example's directory

Expected result:
No '.qtquickcompiler' folder is found (nor the .qrc file the qtquickcompiler generates)

Actual result:
'.qtquickcompiler' folder is found (and the generated .qrc file)