Add fix for #1550 and credit to the ChangeLog
diff --git a/ChangeLog b/ChangeLog
index 4940016..c9480ec 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,8 @@
 = mbed TLS x.x.x branch released xxxx-xx-xx
 
 Bugfix
+   * Fix the inline assembly for the MPI multiply helper function for i386 and
+     i386 with SSE2. Found by László Langó. Fixes #1550
    * Change the shebang line in Perl scripts to look up perl in the PATH.
      Contributed by fbrosson in #1533.
    * Fix a memory leak in mbedtls_x509_csr_parse(), found by catenacyber,