um: get rid of pointless include "..." where include <...> will do

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/x86/um/bugs_64.c b/arch/x86/um/bugs_64.c
index 44e02ba..8cc8256 100644
--- a/arch/x86/um/bugs_64.c
+++ b/arch/x86/um/bugs_64.c
@@ -4,7 +4,7 @@
  * Licensed under the GPL
  */
 
-#include "sysdep/ptrace.h"
+#include <sysdep/ptrace.h>
 
 void arch_check_bugs(void)
 {