8028102: All test targets, jdk/test/Makefile, fail on Windows

Reviewed-by: mduigou
diff --git a/jdk/test/Makefile b/jdk/test/Makefile
index 9a9092d..d8e7dd8 100644
--- a/jdk/test/Makefile
+++ b/jdk/test/Makefile
@@ -64,7 +64,7 @@
 ifeq ($(UNAME_S), CYGWIN)
   # Location of developer shared files
   SLASH_JAVA = J:
-  GETMIXEDPATH = cygpath -m -s
+  GETMIXEDPATH = cygpath -m
 else
   # Location of developer shared files
   SLASH_JAVA = /java