[common] properly define _GNU_SOURCE and set the thread names

common/src/platform/linux/crash.c

@@ -17,7 +17,6 @@ this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 Place, Suite 330, Boston, MA 02111-1307 USA
 */
 
-#define _GNU_SOURCE
 #include "common/crash.h"
 #include "common/debug.h"
 

common/src/platform/linux/thread.c

@@ -54,6 +54,8 @@ bool lgCreateThread(const char * name, LGThreadFunction function, void * opaque,
     *handle = NULL;
     return false;
   }
+
+  pthread_setname_np((*handle)->handle, name);
   return true;
 }
 
@@ -71,4 +73,4 @@ bool lgJoinThread(LGThread * handle, int * resultCode)
 
   free(handle);
   return true;
-}
+}