configure: Remove duplicated use of AC_USE_SYSTEM_EXTENSIONS
Either the first or the second one is redundant so one should be
removed but beware, there's a bug introduced in automake 1.14
(fixed in 1.15) that would potentially cause trouble if you put it
before AM_INIT_AUTOMAKE.
More info about this automake bug here:
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=15981
https://sourceforge.net/p/check/bugs/109
git-svn-id: svn+ssh://svn.code.sf.net/p/check/code/trunk@1216
64e312b2-a51f-0410-8e61-
82d0ca0eb02a
projects / check / commit