patch 7.4.1154
Problem:    No support for JSON.
Solution:   Add jsonencode() and jsondecode().  Also add v:false, v:true,
            v:null and v:none.
diff --git a/src/Make_bc5.mak b/src/Make_bc5.mak
index ddbdbe3..8dcb6e8 100644
--- a/src/Make_bc5.mak
+++ b/src/Make_bc5.mak
@@ -598,6 +598,7 @@
 	$(OBJDIR)\getchar.obj \
 	$(OBJDIR)\hardcopy.obj \
 	$(OBJDIR)\hashtab.obj \
+	$(OBJDIR)\json.obj \
 	$(OBJDIR)\main.obj \
 	$(OBJDIR)\mark.obj \
 	$(OBJDIR)\memfile.obj \