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_dice.mak b/src/Make_dice.mak
index 89fa589..440955e 100644
--- a/src/Make_dice.mak
+++ b/src/Make_dice.mak
@@ -30,6 +30,7 @@
 	autocmd.c \
 	blowfish.c \
 	buffer.c \
+	change.c \
 	charset.c \
 	crypt.c \
 	crypt_zip.c \
@@ -92,6 +93,7 @@
 	o/autocmd.o \
 	o/blowfish.o \
 	o/buffer.o \
+	o/change.o \
 	o/charset.o \
 	o/crypt.o \
 	o/crypt_zip.o \
@@ -177,6 +179,8 @@
 
 o/buffer.o:	buffer.c  $(SYMS)
 
+o/change.o:	change.c  $(SYMS)
+
 o/charset.o:	charset.c  $(SYMS)
 
 o/crypt.o:	crypt.c  $(SYMS)