qt5 virtual pkg: only include pkgs inheriting from qtbase

other pkgs may depend on qtbase and not be part of the modules

src/qt5.mk

@@ -4,6 +4,6 @@
 PKG             := qt5
 $(PKG)_VERSION   = $(qtbase_VERSION)
 $(PKG)_DEPS     := $(patsubst $(TOP_DIR)/src/%.mk,%,\
-                        $(shell grep -l 'DEPS.*qtbase' \
+                        $(shell grep -l 'qtbase_VERSION' \
                                 $(TOP_DIR)/src/qt*.mk \
                                 --exclude '$(TOP_DIR)/src/qt5.mk'))