patch 8.2.4081: CodeQL reports problem in if_cscope causing it to fail

Problem:    CodeQL reports problem in if_cscope causing it to fail.
Solution:   Use execvp() instead of execl().  Merge the header file into the
            source file. (Ozaki Kiichi, closes #9519)
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index f2a45a0..0f6f676 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -1670,7 +1670,7 @@
 
 $(OUTDIR)/gui_dwrite.obj:	$(OUTDIR) gui_dwrite.cpp gui_dwrite.h
 
-$(OUTDIR)/if_cscope.obj: $(OUTDIR) if_cscope.c  $(INCL) if_cscope.h
+$(OUTDIR)/if_cscope.obj: $(OUTDIR) if_cscope.c  $(INCL)
 
 $(OUTDIR)/if_lua.obj: $(OUTDIR) if_lua.c  $(INCL)
 	$(CC) $(CFLAGS_OUTDIR) $(LUA_INC) if_lua.c