add changelog entry

Signed-off-by: eugene <eugene.kobyakov@netfoundry.io>
diff --git a/ChangeLog.d/fix-mingw-build.txt b/ChangeLog.d/fix-mingw-build.txt
new file mode 100644
index 0000000..b5255be
--- /dev/null
+++ b/ChangeLog.d/fix-mingw-build.txt
@@ -0,0 +1,4 @@
+Changes
+   * fix build failure on MinGW toolchain when __USE_MING_ANSI_STDIO is on.
+     When that flag is on, standard GNU C printf format specifiers should be used.
+