Add -lgc also for omplot. Add gc as dependency in the makefiles

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@19581 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

Makefile.in

@@ -85,9 +85,9 @@ omnotebook: mkbuilddirs omplot
 	$(MAKE) -C OMNotebook/OMNotebookGUI -f Makefile.unix 
 omshell: mkbuilddirs
 	$(MAKE) -C OMShell/OMShellGUI -f Makefile.unix
-omplot: mkbuilddirs
+omplot: mkbuilddirs boehm-gc-lib
 	$(MAKE) -C OMPlot/OMPlotGUI -f Makefile.unix
-omedit: mkbuilddirs omplot
+omedit: mkbuilddirs omplot boehm-gc-lib
 	$(MAKE) -C OMEdit/OMEditGUI -f Makefile.unix
 ifeq (@with_paradiseo@,)
 omoptim: