winbuild: In MakefileBuild.vc fix typo DISTDIR->DIRDIST
Change requirement from $(DISTDIR) to $(DIRDIST)
closes #2603
diff --git a/winbuild/MakefileBuild.vc b/winbuild/MakefileBuild.vc
index bf79db3..51ebfb8 100644
--- a/winbuild/MakefileBuild.vc
+++ b/winbuild/MakefileBuild.vc
@@ -502,7 +502,7 @@
@-$(ZIP) -9 -q -r ..\$(CONFIG_NAME_LIB).zip .>nul 2<&1
@cd $(MAKEDIR)
-$(TARGET): $(LIB_OBJS) $(LIB_DIROBJ) $(DISTDIR)
+$(TARGET): $(LIB_OBJS) $(LIB_DIROBJ) $(DIRDIST)
@echo Using SSL: $(USE_SSL)
@echo Using NGHTTP2: $(USE_NGHTTP2)
@echo Using c-ares: $(USE_CARES)