Add ChangeLog entry for library/makefile changes
diff --git a/ChangeLog b/ChangeLog
index 45c07fe..1506b68 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
mbed TLS ChangeLog (Sorted per branch, date)
+= mbed TLS x.x.x branch released xxxx-xx-xx
+
+Changes
+ * Allow configuring the prefix operator for the archiver tool when compiling
+ the library using the makefile. Found and fixed by Alex Hixon.
+ * Allow configuring the shared library extension by setting the DLEXT
+ variable when using the project makefile.
+
= mbed TLS 2.1.11 branch released 2018-03-16
Default behavior changes