patch 8.1.1994: MS-Windows: cannot build with eval but without cscope

Problem:    MS-Windows: cannot build with eval but without cscope
Solution:   Adjust the makefiles to always build if_cscope.obj.
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index 90a3461..9f86cef 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -736,6 +736,7 @@
 	$(OUTDIR)/hardcopy.o \
 	$(OUTDIR)/hashtab.o \
 	$(OUTDIR)/highlight.o \
+	$(OUTDIR)/if_cscope.o \
 	$(OUTDIR)/indent.o \
 	$(OUTDIR)/insexpand.o \
 	$(OUTDIR)/json.o \
@@ -821,9 +822,6 @@
 ifdef TCL
 OBJ += $(OUTDIR)/if_tcl.o
 endif
-ifeq ($(CSCOPE),yes)
-OBJ += $(OUTDIR)/if_cscope.o
-endif
 
 ifeq ($(NETBEANS),yes)
  ifneq ($(CHANNEL),yes)