patch 8.2.0660: the search.c file is a bit big

Problem:    The search.c file is a bit big.
Solution:   Split off the text object code to a separate file. (Yegappan
            Lakshmanan, closes #6007)
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index 750e940..7964b0a 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -787,6 +787,7 @@
 	$(OUTDIR)/tag.o \
 	$(OUTDIR)/term.o \
 	$(OUTDIR)/testing.o \
+	$(OUTDIR)/textobject.o \
 	$(OUTDIR)/textprop.o \
 	$(OUTDIR)/time.o \
 	$(OUTDIR)/ui.o \