test: Move stats into a struct

Use a struct to hold the stats, since we also want to have the same
stats for all runs as we have for each suite.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/ut.c b/test/ut.c
index 7454da3..a16fdfb 100644
--- a/test/ut.c
+++ b/test/ut.c
@@ -21,7 +21,7 @@
 {
 	gd->flags &= ~(GD_FLG_SILENT | GD_FLG_RECORD);
 	printf("%s:%d, %s(): %s\n", fname, line, func, cond);
-	uts->fail_count++;
+	uts->cur.fail_count++;
 }
 
 void ut_failf(struct unit_test_state *uts, const char *fname, int line,
@@ -35,7 +35,7 @@
 	vprintf(fmt, args);
 	va_end(args);
 	putc('\n');
-	uts->fail_count++;
+	uts->cur.fail_count++;
 }
 
 ulong ut_check_free(void)