doxygen: enable autobrief

Enable an usefull option to make easier documentation writting.

Change-Id: I7d0ea254a913dab09548f17167d432d75de901e4
Reviewed-by: Olivier Soldano <olivier.soldano@savoirfairelinux.com>

doc/doxygen/core-doc.cfg.in

@@ -150,7 +150,7 @@ SHORT_NAMES            = NO
 # comments will behave just like regular Qt-style comments
 # (thus requiring an explicit @brief command for a brief description.)
 
-JAVADOC_AUTOBRIEF      = NO
+JAVADOC_AUTOBRIEF      = YES
 
 # If the QT_AUTOBRIEF tag is set to YES then Doxygen will
 # interpret the first line (until the first dot) of a Qt-style