tracing: add #undef to fix compile error

From: Rik van Riel
Date: Wed Sep 28 2016 - 22:56:08 EST

There are several trace include files that define TRACE_INCLUDE_FILE.

Include several of them in the same .c file (as I currently have in
some code I am working on), and the compile will blow up with a
"warning: "TRACE_INCLUDE_FILE" redefined #define TRACE_INCLUDE_FILE syscalls"

Every other include file in include/trace/events/ avoids that issue
by having a #undef TRACE_INCLUDE_FILE before the #define; syscalls.h
should have one, too.

Signed-off-by: Rik van Riel <riel@xxxxxxxxxx>
include/trace/events/syscalls.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/include/trace/events/syscalls.h b/include/trace/events/syscalls.h
index 14e49c798135..b35533b94277 100644
--- a/include/trace/events/syscalls.h
+++ b/include/trace/events/syscalls.h
@@ -1,5 +1,6 @@
#define TRACE_SYSTEM raw_syscalls
#define TRACE_INCLUDE_FILE syscalls