selftests/seccomp: fix 32-bit build warnings

The casting was done incorrectly for 32-bit builds. Fixed to use uintptr_t.
Reported-by: NEric Adams <adamse@google.com>
Signed-off-by: NKees Cook <keescook@chromium.org>
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>

tools/testing/selftests/seccomp/test_harness.h

@@ -42,6 +42,7 @@
 #define TEST_HARNESS_H_
 
 #define _GNU_SOURCE
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -370,8 +371,8 @@
 	__typeof__(_expected) __exp = (_expected); \
 	__typeof__(_seen) __seen = (_seen); \
 	if (!(__exp _t __seen)) { \
-		unsigned long long __exp_print = (unsigned long long)__exp; \
-		unsigned long long __seen_print = (unsigned long long)__seen; \
+		unsigned long long __exp_print = (uintptr_t)__exp; \
+		unsigned long long __seen_print = (uintptr_t)__seen; \
 		__TH_LOG("Expected %s (%llu) %s %s (%llu)", \
 			 #_expected, __exp_print, #_t, \
 			 #_seen, __seen_print); \