all: fix wildcard to work with make-4.x

In make-3.8x, the $(wildacrd) function would sort the entries,
while in make-4.x, it would just return the entries in any
unpredictable order [*]

Use the $(sort) function to get reproducible behaviour.

[*] Well, most probably the roder the entries appear when read
from readdir()

Reported-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Tested-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>

 --- glibc-2_9.orig/nptl/init.c	2007-10-15 22:25:25.000000000 +0200

 +++ glibc-2_9/nptl/init.c	2010-08-18 10:46:06.109098646 +0200

 @@ -236,7 +236,7 @@

  /* This can be set by the debugger before initialization is complete.  */

 -static bool __nptl_initial_report_events;

 +static bool __nptl_initial_report_events __attribute_used__;

  void

  __pthread_initialize_minimal_internal (void)