Update comments about what is a framework (all of these are)

and why they didn't move to the frameworks/ subdir yet.

kf5-frameworks-build-include

@@ -20,9 +20,9 @@ module libdbusmenu-qt
     repository bzr://lp:libdbusmenu-qt
 end module
 
+# Attica will move to frameworks/ once the 4.x branch doesn't matter much anymore
 module-set
     repository kde-projects
-    # Should attica become a kde framework?
     use-modules kdesrc-build extra-cmake-modules attica
     # Optionally: add polkit-qt-1
     cmake-options -DCMAKE_BUILD_TYPE:STRING=debug
@@ -49,12 +49,14 @@ module-set frameworks
     cmake-options -DBUILD_TESTING=TRUE -DCMAKE_BUILD_TYPE:STRING=debug -G "CodeBlocks - Unix Makefiles"
 end module
 
-# Should this become a framework?
+# Will move to frameworks/ once the 4.x branch doesn't matter much anymore
+# (and master branch is used for the Qt5/KF5 version)
 module kde-kactivities
     repository kde:kactivities
     branch frameworks
 end module
 
+# Will move to frameworks/ together with kactivities
 module plasma-framework
     repository kde:plasma-framework
 end module