patch 8.1.1318: code for text changes is in a "misc" file

Problem:    Code for text changes is in a "misc" file.
Solution:   Move the code to change.c.
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index a2ff64a..3e38a27 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -705,6 +705,7 @@
 	$(OUTDIR)/blob.o \
 	$(OUTDIR)/blowfish.o \
 	$(OUTDIR)/buffer.o \
+	$(OUTDIR)/change.o \
 	$(OUTDIR)/charset.o \
 	$(OUTDIR)/crypt.o \
 	$(OUTDIR)/crypt_zip.o \