message: fix default prefix path
diff: @@ -11,7 +11,7 @@ desktop.path=$${L_SHAREDIR}/applications/
  #Install paths
  unix {
  isEmpty(PREFIX) {
  - PREFIX = /usr
  + PREFIX = /usr/local
  }
  isEmpty(PLUGINDIR) {
  PLUGINDIR = $$[QT_INSTALL_PLUGINS]
  