ICU-20658 Fix broken Data Filtering on Windows builds.
diff --git a/icu4c/source/data/makedata.mak b/icu4c/source/data/makedata.mak
index 522283d..b0b813c 100644
--- a/icu4c/source/data/makedata.mak
+++ b/icu4c/source/data/makedata.mak
@@ -240,9 +240,9 @@
--tool_dir "$(ICUTOOLS)" \
--tool_cfg "$(CFG)" \
--out_dir "$(ICUBLD_PKG)" \
- --tmp_dir "$(ICUTMP)"
+ --tmp_dir "$(ICUTMP)" \
--filter_file "$(ICU_DATA_FILTER_FILE)" \
- $(ICU_DATA_BUILDTOOL_OPTS) \
+ $(ICU_DATA_BUILDTOOL_OPTS)
@echo "timestamp" > $(COREDATA_TS)