ENH: fix warnings on windows paths

CTestCustom.ctest.in

@@ -10,14 +10,14 @@ SET(CTEST_CUSTOM_WARNING_EXCEPTION
   "libcmcurl.*has no symbols"
   "not sorted slower link editing will result"
   "stl_deque.h:479"
-  "Utilities/cmzlib/"
-  "Utilities/cmxmlrpc/"
-  "Source/CTest/Curl"
-  "Utilities/cmcurl"
-  "Source/CursesDialog/form"
+  "Utilities.cmzlib."
+  "Utilities.cmxmlrpc."
+  "Source.CTest.Curl"
+  "Utilities.cmcurl"
+  "Source.CursesDialog.form"
   "/usr/bin/ld.*warning.*-..*directory.name.*bin.*does not exist"
   "Redeclaration of .send..... with a different storage class specifier"
-  "Utilities/cmexpat/"
+  "Utilities.cmexpat."
   "is not used for resolving any symbol"
   "Clock skew detected"
   "remark\\(1209"