6829575: 100028: Debug information is incomplete or missing

Summary: Enable debugging in many places
Reviewed-by: ohair
Contributed-by: NAndrew Haley <aph@redhat.com>

make/Makefile

@@ -105,6 +105,14 @@ else
   endif
 endif
 
+ifeq ($(DEBUG_CLASSFILES), true)
+  ANT_OPTIONS += -Djavac.debug=true
+  ANT_OPTIONS += -Djavac.debuglevel=source,lines,vars
+else
+  ANT_OPTIONS += -Djavac.debug=false
+  ANT_OPTIONS += -Djavac.debuglevel=
+endif
+
 # Note: jdk/make/common/Defs.gmk uses LANGUAGE_VERSION (-source NN)
 # and the somewhat misnamed CLASS_VERSION (-target NN)
 ifdef TARGET_CLASS_VERSION