tracing/kmemtrace: fix typo

Impact: build fix

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/mm/slab.c b/mm/slab.c
index 83075f3..c65c52d 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -102,7 +102,7 @@
 #include	<linux/cpu.h>
 #include	<linux/sysctl.h>
 #include	<linux/module.h>
-#include	<tracing/kmemtrace.h>
+#include	<trace/kmemtrace.h>
 #include	<linux/rcupdate.h>
 #include	<linux/string.h>
 #include	<linux/uaccess.h>