Fixes: bin dir of msvc qt versions was not added to the path

The setting of msvc environments variables overwrote that. Fix that by running the script with the correct environment.

src/plugins/qt4projectmanager/qtversionmanager.cpp

@@ -1235,7 +1235,6 @@ void QtVersion::addToEnvironment(Environment &env)
     // add libdir, includedir and bindir
     // or add Mingw dirs
     // or do nothing on other
-
 }
 
 int QtVersion::uniqueId() const