Update limits headers for better platform compat

This change enables building libcper based cli tools on mac systems.

Change-Id: If9b0134d3677b84c57603fa83d546b58e8c2d073
Signed-off-by: Andrew Adriance <aadriance@nvidia.com>
diff --git a/cli-app/cper-convert.c b/cli-app/cper-convert.c
index 0ebc707..5ff748b 100644
--- a/cli-app/cper-convert.c
+++ b/cli-app/cper-convert.c
@@ -8,7 +8,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <libgen.h>
-#include <linux/limits.h>
+#include <limits.h>
 #include <json.h>
 #include "../cper-parse.h"
 #include "../json-schema.h"