patch 8.1.1076: file for Insert mode is much too big

Problem:    File for Insert mode is much too big.
Solution:   Split off the code for Insert completion. (Yegappan Lakshmanan,
            closes #4044)
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index 98210c1..e439de3 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -721,6 +721,7 @@
 	$(OUTDIR)/hardcopy.o \
 	$(OUTDIR)/hashtab.o \
 	$(OUTDIR)/indent.o \
+	$(OUTDIR)/insexpand.o \
 	$(OUTDIR)/json.o \
 	$(OUTDIR)/list.o \
 	$(OUTDIR)/main.o \