added entry for task path/line when verbose

CHANGELOG.md

@@ -285,6 +285,7 @@ you avoid ever writing sensitive plaintext to disk.
 * ansible-vault rekey accepts the --new-vault-password-file option.
 * Configuration items defined as paths (local only) now all support shell style interpolations.
 * Many fixes and new options added to modules, too many to list here.
+* Now you can see task file and line number when using verbosity of 3 or above.
 
 ## 1.9.2 "Dancing In the Street" - Jun 26, 2015