Add changes file for bug17151

changes/bug17151

@@ -0,0 +1,7 @@
+  o Minor bugfixes (portability):
+    - Use libexecinfo on FreeBSD, to enable backtrace support. Fixes part of
+      bug 17151; bugfix on 0.2.5.2-alpha. Patch from Marcin Cieślak.
+
+  o Minor bugfixes (testing):
+    - Skip backtrace tests when backtrace support is not compiled in. Fixes
+      part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from Marcin Cieślak.