mingw: ensure temporary file handles are not inherited by child processes

diff --git a/RelNotes b/RelNotes
index 8cf972cf485bbc26c479a6ac07f3005b1d188c84..779efe8a422f4522a266db6a42178a3330d94789 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.7.0.2.txt
\ No newline at end of file
+Documentation/RelNotes/2.9.3.txt
\ No newline at end of file