Rename INIT_LAST to INIT_FUNC to avoid confusion

We don't have an INIT_FIRST, so let's rename INIT_LAST to INIT_FUNC
to imply that the function is called at program start-up.

Also: the priority argument for __attribute__((constructor)) isn't
used, so let's remove it.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/include/platform.h b/include/platform.h
index 413c222..09c7ccd 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -76,8 +76,8 @@
 # define UNUSED_PARAM_RESULT
 #endif
 
-/* used by unit test machinery to run registration functions */
-#define INIT_LAST __attribute__ ((constructor(2000)))
+/* used by unit test machinery to run registration functions before calling main() */
+#define INIT_FUNC __attribute__ ((constructor))
 
 /* -fwhole-program makes all symbols local. The attribute externally_visible
  * forces a symbol global.  */