Add of ChangeLog and whatsnew entries

ChangeLog

@@ -164,6 +164,11 @@ What's New in Pylint 1.8?
       modules when checking import order.
       Close #1702
+    * Fix ``line-too-long`` message deactivated by wrong disable directive.
+      The directive ``disable=fixme`` doesn't deactivate anymore the emission 
+      of ``line-too-long`` message for long commented lines.
+      Close #1741
+
 What's New in Pylint 1.7.1?
 =========================

doc/whatsnew/1.8.rst

@@ -357,3 +357,7 @@ Other Changes
 * Fix no ``wrong-import-order`` message emitted on ordering of first and third party libraries.
   With this fix, pylint distinguishes first and third party modules when checking
   import order.
+
+* Fix ``line-too-long`` message deactivated by wrong disable directive.
+  The directive ``disable=fixme`` doesn't deactivate anymore the emission 
+  of ``line-too-long`` message for long commented lines.