eina: fix build for big endian platforms

Summary:
The code in eina_debug.c requires the eina_swapX() functions on big endian platforms, so include the required header.

Test Plan: Do build on big endian platform like ppc64 or s390x.

Subscribers: kubu, cedric, jpeg

Differential Revision: https://phab.enlightenment.org/D5158

src/lib/eina/eina_debug.c

@@ -60,6 +60,7 @@
 #endif
 
 #include "eina_debug.h"
+#include "eina_cpu.h"
 #include "eina_types.h"
 #include "eina_list.h"
 #include "eina_mempool.h"