Build: Fix IAR build when TFM_EXCEPTION_INFO_DUMP=ON

IAR build fails if TFM_EXCEPTION_INFO_DUMP=ON is
defined. Added the missing IAR specific pragma
which solved the issue.

Signed-off-by: Dávid Házi <david.hazi@arm.com>
Change-Id: I1e92f05d6e9d7fecaedcb2b762ead09eb9a4ef99
diff --git a/platform/ext/common/exception_info.c b/platform/ext/common/exception_info.c
index 25e7e7c..f4fc17c 100644
--- a/platform/ext/common/exception_info.c
+++ b/platform/ext/common/exception_info.c
@@ -6,8 +6,9 @@
 
 #include <string.h>
 #include "tfm_arch.h"
-#include "exception_info.h"
 #include "tfm_spm_log.h"
+/* "exception_info.h" must be the last include because of the IAR pragma */
+#include "exception_info.h"
 
 struct exception_info_t {
     uint32_t EXC_RETURN;        /* EXC_RETURN value in LR. */