Name fix of GCC implementation of atomic write long

src/ITAAtomicOpsGCCBuiltinsImpl.cpp

@@ -59,7 +59,7 @@ void atomic_write_int( volatile int* dest, int value )
 	__sync_lock_test_and_set( dest, value );
 }
 
-void atomic_write_int( volatile long* dest, long value )
+void atomic_write_long( volatile long* dest, long value )
 {
 	__sync_lock_test_and_set( dest, value );
 }