cyanogen: Changelog for SEMC devices

Update the changelog for anzu, hallon and zeus.
diff --git a/CHANGELOG.mkdn b/CHANGELOG.mkdn
index 7e5d1d2..1926df1 100644
--- a/CHANGELOG.mkdn
+++ b/CHANGELOG.mkdn
@@ -47,6 +47,9 @@
 * Jordan (Defy): Quarx, Epsylon3, maniac103
 * Droid2 (MotoA955): JBirdVegas, RevNumbers
 * Galaxy S II (GT-I9100): atinm, codeworkx, coolya, GuiperPT, Unhelpful
+* Xperia Arc (LT15i): Bin4ry,defer,jerpelea (FreeXperia team)
+* Xperia Neo (MT15i): Bin4ry,defer,jerpelea (FreeXperia team)
+* Xperia Play (R800i): Bin4ry,defer,jerpelea (FreeXperia team)
 
 Translators:
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