Fix compilation error with Mingw32
Fix compilation error on Mingw32 when `_TRUNCATE` is defined. Use
`_TRUNCATE` only if `__MINGW32__` not defined. Fix suggested by
Thomas Glanzmann and Nick Wilson on issue #355
diff --git a/ChangeLog b/ChangeLog
index 227faed..f8dcae5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
mbed TLS ChangeLog (Sorted per branch, date)
+= mbed TLS x.x.x branch released xxxx-xx-xx
+
+Bugfix
+ * Fix compilation error on Mingw32 when `_TRUNCATE` is defined. Use `_TRUNCATE`
+ only if `__MINGW32__` not defined. Fix suggested by Thomas Glanzmann and
+ Nick Wilson on issue #355
+
= mbed TLS 2.6.0 branch released 2017-08-10
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