Change include order in unittest files

The tests are compiled without -D_GNU_SOURCE, therefore
the XSI version of strerror_r is used. Defining
_GNU_SOURCE in torture.h then including *.c gives error
because it is assuming GNU version of strerror_r in
the source file.

Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>

tests/unittests/torture_threads_pki_rsa.c

@@ -26,10 +26,10 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
+#include "pki.c"
 #include "torture.h"
 #include "torture_pki.h"
 #include "torture_key.h"
-#include "pki.c"
 
 #include <pthread.h>