fix the host/emulation build

Going for __ARM__ to distinguish host and firmware builds is not
sufficient here, since we might be building on a ARM host, so there is
now a OCTSIMFWBUILD define.

Change-Id: Ib07a58b6102b1709f295d08a764c6f118a2d0b9e
diff --git a/ccid_common/iso7816_3.c b/ccid_common/iso7816_3.c
index f7262fb..9a3a7cb 100644
--- a/ccid_common/iso7816_3.c
+++ b/ccid_common/iso7816_3.c
@@ -18,7 +18,7 @@
 #include <stdint.h>
 #include <stddef.h>
 
-#include "utils.h"
+#include <osmocom/core/utils.h>
 #include "iso7816_3.h"
 
 const uint16_t iso7816_3_fi_table[16] = {